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Unleaded Fuel Transition Plan to Be Unveiled Public Comment DEADLINE March 13, 2026

by Russ Niles (AvBrief) The FAA may lay its cards on the table on just how it’s going to have all piston aircraft burning unleaded fuel within the next five years. The agency will issue its Draft FAA Transition Plan to

January 12, 2026 Read Full Article

EPA Endangerment Finding Repeal Goes to White House for Final Review

by Alex Guillén (Politico Pro) ... As proposed in July, EPA argued that the Clean Air Act does not give it the authority to address climate change because of the global nature of greenhouse gas emissions. By revoking the 2009 endangerment finding

January 10, 2026 Read Full Article

Why EPA Might Purge Climate Skepticism from Its Endangerment Repeal

by Jean Chemnick (E&E News Climatewire)  The DOE report by climate contrarians has caused legal problems for Administrator Lee Zeldin’s attempts to roll back the scientific finding. -- Deepening legal woes surrounding a Trump administration report that casts aspersions on climate science

December 16, 2025 Read Full Article

Americans Paying Record Electricity Prices as Gas Costs Climb

Naureen S. Malik (Bloomberg/Yahoo!) American households are paying more than ever before for electricity after prices surged the most in almost two years, according to the US Energy Information Administration. The average retail price for electricity gained 7.4% in September to a

December 01, 2025 Read Full Article

National Academies Publish New Report Reviewing Evidence for Greenhouse Gas Emissions and U.S. Climate, Health, and Welfare

(National Academies of Sciences, Engineering and Medicine)  A new report from the National Academies of Sciences, Engineering, and Medicine says the evidence for current and future harm to human health and welfare created by human-caused greenhouse gases is beyond scientific dispute. The report focuses

September 17, 2025 Read Full Article

EPA Scheduled to Issue Final RFS ‘Set 2’ Rule in October

by Erin Krueger (SAF Magazine) The White House Office of Management and Budget on Sept. 4 published its Spring 2025 Unified Agenda of Regulatory and Deregulatory Actions, which confirms the U.S. EPA plans to finalize its Renewable Fuel Standard “Set 2”

September 06, 2025 Read Full Article

Two Decades of Success with the RFS

by Geoff Cooper (Renewable Fuels Association)  Lower gas prices. More energy independence. Stronger farms. Cleaner air. What’s not to like? These results are the proven outcomes of a groundbreaking bipartisan energy policy established twenty years ago, which continues to deliver benefits

August 04, 2025 Read Full Article

A Critical Review of Impacts of Greenhouse Gas Emissions on the U.S. Climate Public Comment DEADLINE September 2, 2025

(U.S. Department of Energy)  On July 29, 2025, the Department of Energy (DOE) published a report entitled A Critical Review of Impacts of Greenhouse Gas Emissions on the U.S. Climate, evaluating existing peer-reviewed literature and government data on climate impacts of Greenhouse

July 30, 2025 Read Full Article

EPA Moves to End Climate Regulation under Clean Air Act Public Comment DEADLINE September 15, 2025

by Jake Spring and Anusha Mathur (Washington Post)  The Environmental Protection Agency on Tuesday announced a proposal to rescind the landmark legal opinion that underpins virtually all of its regulations to curb climate change. The move would end EPA regulations on greenhouse

July 29, 2025 Read Full Article

RFA Congratulates Aaron Szabo on Senate Confirmation

(Renewable Fuels Association) The Renewable Fuels Association today congratulated Aaron Szabo on his Senate confirmation to lead the U.S. Environmental Protection Agency’s Office of Air and Radiation (OAR). Among its responsibilities, the OAR administers the Clean Air Act, which includes oversight

July 24, 2025 Read Full Article

Trump Admin Advances Climate Reg Overhaul

by Sean Reilly (Politico Pro Climatewire)  The move opens the door to revise a suite of rules clamping down on heat-trapping emissions, especially from the industrial and transportation sectors.  --  EPA has taken its first public step toward revisiting the landmark 2009

July 02, 2025 Read Full Article

Trump Environmental Rollbacks Would Boost Pollution and Endanger Lives, Former EPA Heads Say

by Matthew Daly (Associated Press) Three former Environmental Protection Agency leaders sounded an alarm Friday, saying rollbacks proposed by EPA Administrator Lee Zeldin endanger the lives of millions of Americans and abandon the agency’s dual mission to protect the environment and human health. Zeldin

March 17, 2025 Read Full Article

EPA Decided Protecting the Environment Is Just Too Much

by Mark Gongloff (Bloomberg)  The agency is abandoning its mission in a misguided effort to boost an economy it will only end up hurting. -- The EPA’s announcement on Wednesday that it would find the narrowest possible definition of the word “water” for regulatory purposes

March 14, 2025 Read Full Article

Trump Set a Deadline on the Endangerment Finding. Here’s What Might Happen.

by Jean Chemnick (E&E News Climatewire) The president ordered EPA Administrator Lee Zeldin to decide by next week on one of the first major issues facing his agency.  --  EPA Administrator Lee Zeldin has one week to tell President Donald Trump whether

February 12, 2025 Read Full Article

US Says Lead Emissions from Small Piston-Engine Aircraft Pose Public Health Danger

by David Shepardson (Reuters)  The U.S Environmental Protection Agency on Wednesday issued a final determination declaring that emissions from aircraft that use leaded fuel pose a danger to public health, following years of study. Commercial aircraft use jet fuel, which does not contain

October 18, 2023 Read Full Article

New FAA Reauthorization Bill Would Prohibit Removing 100LL From Airports (Corrected)

by Paul Bertorelli (AvWeb) The just-passed House FAA Reauthorization Bill would prevent airports from removing 100LL or offering unleaded fuels in lieu of leaded avgas under penalty of losing airport improvement grants. If the language remains in the Senate version of

July 24, 2023 Read Full Article

Update Triggers Questions on Unleaded Avgas Progress GAMA Hosted the EAGLE Roundtable, Bringing Together Stakeholders Looking for More Transparency and Urgency.

by Julie Boatman (Flying Magazine) GAMA hosted the EAGLE roundtable, bringing together stakeholders looking for more transparency and urgency.  -- The clock ticks louder each week, it seems, as pressure grows to move forward with a viable replacement for the primary unleaded

June 07, 2023 Read Full Article

Aviation Stakeholder Groups Submit Comments to EPA’s Proposed Endangerment Finding

(National Business Aviation Association)  A coalition of seven aviation stakeholder organizations has formally submitted comments to the U.S. Environmental Protection Agency’s (EPA) proposed endangerment finding of lead in aviation gasoline (avgas). The coalition reaffirmed its support for removing lead from avgas

January 23, 2023 Read Full Article

$10 Million Approved For Unleaded Avgas Evaluation

by Russ Niles (AvWeb) Congress has approved $10 million for testing and evaluation of unleaded high octane aviation fuels and all sectors currently involved in the effort can qualify for funding. According to AOPA, President Joe Biden signed the bill that

January 05, 2023 Read Full Article

EPA Proposes Endangerment Finding for Lead Emissions from Aircraft Engines that Operate on Leaded Fuel

(Environmental Protection Agency) Proposed Endangerment Finding, if finalized, is an important step forward to address the largest remaining source of lead pollution to air --  Today, the U.S. Environmental Protection Agency (EPA) announced a proposed determination that emissions of lead from

October 07, 2022 Read Full Article

EAGLE Stakeholders Convene First Meeting, Seek Solution to Leaded Fuel

by Walker Jaroch (Aviation Pros)  The Eliminate Aviation Gasoline Lead Emissions (EAGLE) initiative held its first meeting this week, discussing the challenges around and needs of removing lead from general aviation fuel over a two day event. ... The two-day event was

March 18, 2022 Read Full Article

States, Green Groups Challenge EPA's Aviation GHG Standard

by Juan Carlos Rodriguez (Law360) States and green groups are urging the D.C. Circuit to order the U.S. Environmental Protection Agency to strengthen Trump-era aviation greenhouse gas emissions standards that have been maintained by the Biden administration. California and 11 other states,

March 02, 2022 Read Full Article

EPA Announces Leaded Fuel Endangerment Finding

by Mark Phelps (AvWeb) In a long-anticipated move, the Environmental Protection Agency (EPA) announced today (Jan. 12) that it “will take the necessary steps to regulate lead pollution from aircrafts (sic).” Those steps start with proposing an “endangerment finding” on leaded

January 13, 2022 Read Full Article

Time for One More Salute to Bob Dole – As an Early Ethanol Pioneer He Laid the Foundation for Modern Biofuels

by Doug Durante (Clean Fuels Development Coalition/Biofuels Digest) ... When Bob Dole agreed to co-sponsor an amendment with Tom Daschle, a Democrat from South Dakota, it set in motion a series of events that became the building blocks for the modern

January 07, 2022 Read Full Article

Regulatory and Policy Analysis of Production, Development and Use of Sustainable Aviation Fuels in the United States

Ekrem Korkut and Lara B. Fowler (Frontiers in Energy Research)  The United States, spurred in part by international developments, is expanding its law and policy to incentivize the use of sustainable aviation fuels. While the U.S. has agreed to participate

January 03, 2022 Read Full Article

Nearly Half of U.S. Commercial Trucks Now Powered by Near-Zero Emissions Diesel Technology, Delivering Climate and Clean Air Benefits

(Diesel Technology Forum) ...  “The use of biobased diesel fuels, that includes biodiesel and renewable diesel fuel, can greatly reduce greenhouse gas emissions today, as is proven in California where biodiesel and renewable diesel fuel used in diesel vehicles reduced

September 15, 2021 Read Full Article

Governors Ask EPA to Clarify Biogenic CO2 Not Regulated under CCA

by Erin Voegele (Biomass Magazine) Governors representing Iowa, Indiana, Kentucky, Nebraska and North Dakota recently sent a letter to U.S. EPA Administrator Andrew Wheeler urging the agency to clarify biogenic CO2 is not a pollutant subject to regulation under the Clean

August 21, 2019 Read Full Article

Climate Policy Foes Seize on New White House Rule to Challenge Endangerment Finding

by Marianne Lavelle (Inside Climate Today)  The rule opened new ways for the fossil fuel industry to challenge science-based policy. One group is using it to try to shatter the foundation of climate policy.  --  ... The Competitive Enterprise Institute (CEI), a

June 07, 2019 Read Full Article

Senate GOP Expected to Force Vote on Green New Deal in March

by Jordain Carney (The Hill) Senate Republicans will bring the Green New Deal resolution to the floor as they try to jam Democrats on the progressive proposal.  Sen. John Cornyn (R-Texas), a member of Senate GOP leadership, said that he expected Majority Leader Mitch McConnell (R-Ky.)

March 14, 2019 Read Full Article

Study: 'No Scientific Basis' For Challenges To EPA Endangerment Finding

by Barbara Moran (WBUR News)  There’s more proof that greenhouse gases are dangerous to human health. That’s the conclusion of a study published Thursday in the journal Science, for which researchers reviewed hundreds of scientific papers on climate change published since 2009. The study supports the U.S. Environmental Protection

December 14, 2018 Read Full Article

Biofuel Takes Flight: Virgin Atlantic 747 Aircraft Partly Powered by Recycled Fuel

by Neil Lancefield (Perth Now) The first commercial flight powered partly by a new form of biofuel converted from alcohol has been completed. Virgin Atlantic's Boeing 747 aircraft landed at London Gatwick with a fuel blend containing 5.0 per cent biofuel made from

October 05, 2018 Read Full Article

In a Q&A with The Washington Post on Friday, Wheeler Showed He Differs from Pruitt

by Kelsey Tamborrino (Politico's Morning Energy)  In a Q&A with The Washington Post on Friday, (EPA Acting Administrator Scott) Wheeler showed he differs from Pruitt in at least one major way. He said he considers an endangerment finding that is the agency's

July 09, 2018 Read Full Article

Calif. to Fight Trump’s ‘Politically Motivated’ Car Standards Plan

by Timothy Cama and Miranda Green (The Hill)  California officials promised Monday to put up a fight against the Trump administration’s newly announced decision to lower standards for car tailpipe emissions. The Environmental Protection Agency (EPA) declared Monday afternoon that the Obama-era greenhouse

April 03, 2018 Read Full Article

EPA Chief Signals Showdown With California on Fuel Emission Standards

by Jennifer A. Dlouhy, Ryan Beene and John Lippert (Bloomberg Politics)  Pruitt warns California isn’t in driver’s seat on car rules; EPA faces April 1 deadline to decide on current requirements  --  The Trump administration’s chief environmental regulator signaled a coming showdown with

March 14, 2018 Read Full Article

A New Years Resolution for EPA: Do Your Job!

by Doug Sombke (South Dakota Farmers Union/Biofuels Digest)  ...  I am referring to the mandatory requirements in the Clean Air Act that EPA enforce section 202 (l), the “clean octane” provision designed to reduce the use of toxic aromatic compounds in gasoline.

January 03, 2018 Read Full Article

EPA Stops Work on Airline Emissions Standards

(Summit County Citizens Voice)  Agency’s move could violate federal environmental laws  --  A little more than a year after determining that greenhouse gas emissions from aircraft are a threat to public health, the EPA has stopped working on developing new

September 20, 2017 Read Full Article

More Pruitt Highlights

by Anthony Adragna (Politico's Morning Energy)  During the second half of more than six hours of questioning for Scott Pruitt, the EPA pick said he saw no reason to review the agency’s 2009 endangerment finding, the scientific conclusion that climate

January 19, 2017 Read Full Article

EPA Denies Petition Filed by Biogenic CO2 Coalition

by Erin Voegele (Biomass Magazine)  The U.S. EPA has denied a petition for reconsideration of its finding that greenhouse gas (GHG) emissions from aircraft cause or contribute to air pollution that may be reasonably anticipated to endanger public health and

January 06, 2017 Read Full Article

Alternative Jet Fuels Tackle Rising Aviation Emissions

by Rebecca Chillrud (Environmental and Energy Study Institute)  ... The U.S. Environmental Protection Agency recently issued an endangerment finding for aircraft, indicating that greenhouse gas emissions from aircraft are hazardous to public health. This finding requires the EPA to begin crafting

September 19, 2016 Read Full Article

EPA Releases Endangerment Finding for Aircraft, Good News for Biofuels

by Rebecca Chillrud  (Energy and Environmental Study Institute)  ... On July 25, the U.S. Environmental Protection Agency (EPA) released its endangerment finding for aircraft, indicating that greenhouse gas emissions from aircraft are hazardous to public health. This finding requires the EPA

August 02, 2016 Read Full Article

EPA Sets Stage for Regulating Airplane Emissions

by Devin Henry (The Hill)  Regulators have formally concluded greenhouse gas emissions from airplanes pose a threat the environment, the first step toward new federal rules. The moved, called an “endangerment finding,” from the Environmental Protection Agency (EPA) requires officials to

August 02, 2016 Read Full Article

White House Takes Aim at a Fast-Growing Source of Emissions: Airplanes

by Brady Dennis (The Washington Post)  ... The EPA issued a scientific assessment known as an “endangerment finding,” which determined that emissions from certain kinds of plane engines contribute to pollution that fuels climate change and creates health risks for Americans. Emissions that

July 26, 2016 Read Full Article

Environmental Groups File Lawsuit over Pollution from U.S. Aircraft

by Valerie Volcovici (PlanetArk)  Three environmental groups filed a lawsuit against the Environmental Protection Agency on Tuesday to press for faster action in setting limits on greenhouse gas emissions from U.S. aircraft.  Earthjustice, the Center for Biological Diversity and Friends of

April 18, 2016 Read Full Article

Ted Cruz on Energy and Climate: Free Market Directions

by Robert Bradley Jr. (Master Resource)  ... 1) Do you support ending all energy subsidies, including cleaning up the tax code to treat all types of energy the same?  A: Yes, I support a true all-of-the-above approach to energy, ending all

April 04, 2016 Read Full Article

U.S. EPA Moves toward Regulating Aircraft Emissions

by Valerie Volcovici (Planet Ark)  Agency announces an Aug. 11 hearing, a 60-day window for the public to weigh in -- The Obama administration on Wednesday released a scientific finding that greenhouse gases from aircraft pose a risk to human health,

June 11, 2015 Read Full Article

U.S. May Take First Step to Curb Airline Emissions This Week: Sources

by Valerie Volcovici (Planet Ark/Reuters)  The U.S. Environmental Protection Agency plans as soon as Friday to determine whether carbon dioxide from aircraft endangers public health, a first step to regulating emissions from the aviation sector, sources familiar with the rulemaking

June 03, 2015 Read Full Article

Continued EPA Delay over Taking Action on Greenhouse Gas Emissions from Aircraft Engines Angers US Environmental Groups

(GreenAirOnline)  A longstanding fight between a coalition of four US environmental groups and the US Environmental Protection Agency (EPA) looks set to continue after the EPA ruled out any short-term decision on whether greenhouse gas emissions from aircraft engines endanger

June 27, 2012 Read Full Article

Groups Challenge EPA on Greenhouse Finding

by Light and Medium Truck (Transport Topics Online) A group including motor carriers, businesses, several members of Congress and a conservative public interest legal foundation has filed a lawsuit in federal appeals court challenging the U.S. Environmental Protection Agency’s finding

March 15, 2010 Read Full Article

No New Regulations Announced, Reasonable Causes For Challenges Abound: EPA’s Endangerment and Cause or Contribute Findings for Greenhouse Gases Under Section 202(a) of the Clean Air Act

by Robert E. Kozak (Advanced Biofuels USA)  EPA’s much ballyhooed finding that CO2 and five other greenhouse gases (GHG) meet Clean Air Act requirements as health hazards is being treated by the Administration and the media as a significant decision

December 07, 2009 Read Full Article

EPA Finds Greenhouse Gases Pose Threat to Public Health, Welfare

After a thorough scientific review ordered in 2007 by the U.S. Supreme Court, the Environmental Protection Agency issued a proposed finding Friday, April 17, 2009, that greenhouse gases contribute to air pollution that may endanger public health or welfare.   EPA’s proposed

April 17, 2009 Read Full Article
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carbohydrates carbon carbon capture and storage (CCS) carbon capture and utilization (CCU) carbon capture/Class VI wells carbon cost carbon credit carbon credit markets carbon cycle carbon debt Carbon Dioxide (CO2) carbon efficiency carbon emissions carbon fiber carbon insets Carbon Intensity (CI)/Carbon Footprint carbon life cycle carbon markets Carbon Monoxide (CO) carbon negative carbon neutrality carbon offsets carbon pipeline carbon price carbon recycling carbon removal carbon sink carbon standard carbon tax Carbon tax border adjustments carbon tax-and-dividend carbon terminal carbon user fee Carbon Utilization and Biogas Education Program carbon-14 testing carbon-efficient fuels carbon/CO2 sequestration carcinogens cardoon Caribbean carinata carinata/brassica carinata carob CAS Registry cashew cashew apple Cashew Nut Shell Liquid (CNSL) CASI Cassava cassava price cassava pulp cassava stalk castor bean castor stalk catalysis catalysts catalytic decarboxylation catalytic 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Plan (CPP) Clean Trucks Plan Clean Water Act climate change Climate Change Adaptation climate change effects climate change mitigation climate legislation climate smart/modern/conservation agriculture closed-loop system Clostridium thermocellum cloud point clover cmelina CNG Conversion kit co co-generation co-location Co-op Extension co-operative co-processing co-products CO2 Electrolysis CO2 neutral fuels CO2Removal Certificates (CORCs) coal Coal and Biomass to Liquid (CBTL) Coast Guard coastal habitat conservation coastal hay cobalt cock's foot coco coco methyl ester (CME) cocoa cocoa husks Coconut coffee coffee cherries coffee grounds coffee pulp cold flow cold-tolerance college/university Colombia Colorado combined heat and power (CHP) Comment Request commercial flights commercialization commissioning commo Commodity Credit Corporation (CCC) Commodity Futures Trading Commission (CFTC) commodity trading common reed Community activity community college Community involvement/engagement community scale Community Wood Energy Program competition compliance compliance credits compost Compressed Natural Gas (CNG/R-CNG/bioCNG) compression ratios compression-ignition engine computer simulation concrete condensate Congo Congressional Budget Office (CBO) Congressional Review Act Connecticut Conservation Reserve Program (CRP) Conservation Stewardship Program (CSP) construction and demolition waste/debris consumer education contamination contest contrails conversion technology Cook Islands cook stoves cooking fuel cooperatives COP21 COP22 COP23 COP24 COP25 COP26 COP27 COP28 COP29 COP30 copper coppice CORCs (CO2 Removal Certificates) cordgrass corn bran Corn cobs corn ethanol corn fiber corn growers corn harvest corn kernel corn meal corn oil corn oil/distillers corn oil (DCO) corn prices corn stalks corn stover corn supply corn surplus corn syrup corn-based products corn/maize Corporate Average Fuel Economy (CAFE) standards corporate social responsibility corrosion corruption CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation) cosmetics Costa Rica cotton cotton seed hulls cotton seed oil cotton stalk cottonwood Council on Environmental Quality county cover crops cow rumen cracking Crambe crassulacean acid metabolism plants (CAM) crimes criteria pollutants Croatia crop crop insurance cropland croton crowdfunding crude lignin oil (CLO) crude oil Cruise Ships Cuba cup plant cuphea currency/foreign exchange policy curriculum cusi Customs and Border Protection cutworm caterpillars cyanobacteria (blue-green algae) cylindro Cyprus Czech Republic d D-3 (cellulosic) RINs D-4 (bio-based diesel) RINs d-5 D-5 (advanced biofuel) RINs D-6 (renewable fuel) RINs D-7 RINs (Cellulosic Diesel) D-8 (proposed) RINs D20 (20%DME) D5 (5%DME) dairy waste dandelion DARPA date kernel oil date palm date palm pits date palm waste Dates DDGS (distiller’s dried grains with solubles) dead zone decanol decision-support tool deep water drilling 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directed evolution dispense distillates distillation distilled biodiesel distilled palm methyl ester (DPME) distilleries distributed/centralized distribution distribution capacity distribution waiver diversification divestment DME/rDME (dimethyl ether)/renewable DME DMF (2.5-dimethylfuran) Dominican Republic double cropping drawdown Drones/Unmanned Aerial Vehicles (UAV) drop-in biofuels/hydrocarbons drought drought tolerant drought-resistant dry ice dual cropping dual-fuel/flex fuel ships Dubai duckweed e e-diesel e-LNG (synthetic/electro Liquified Natural Gas) e-methanol e-NG (synthetic natural gas) E. coli E0 E0 price E1 E10 E10 certification fuel E10 price E100 E100 conversion kit E10M90 ethanol/methanol E11 E12 E13 E15 E15 price E15 pumps E2 E20 E20 price E20 pumps E22 E25 E25 pumps E27 E3 E30 E30 capable E30 certification fuel E30 optimized E30 price E30 pumps E35 E4 E40 E40 conversion kit E40 pumps E5 E5 price E50 E55 E6 E7 E70 diesel E75 E78 E8 E80 E85 E85 conversion kit E85 optimized engines E85 price E85 pumps E90 E92 E95 E97 E98 earthquakes East Africa Eastern Europe economic development Economic Development Administration economic modeling economic policy economics Ecosystems Services Ecuador ED7 (7% ethanol 93% diesel) ED95 education Education Series 3030 educational business private educational tour EERE efficiency egg shell Egypt El Salvador Electric aircraft Electric Car/Electric Vehicle (EV) electric car/Electric Vehicle (EV) Prices electric grid electricity electricity price electricity/power generation electricity/power transmission electrocatalysis electrochemical electrochemical cell electrofuels (e-fuels) electrofuels (e-fuels) prices electrolysis electrolytic cation exchange electromethanogenesis (ME) electrons Elephant grass/Napier grass elephants embargo eminent domain emissions emissions standards EN 15751 EN 15940 EN 16709 EN 228 EN 590 EN228 (standard pump gasoline) end user end-of-life Endangered Species Act (ESA) Energy Bill energy cane energy consumption energy crops energy density energy dominance energy grasses energy independence Energy Independence and Security Act of 2007 (EISA) Energy Information Administration (US EIA) energy law energy policy energy prices energy reserves Energy Return on Energy Invested (EROEI or EROI) energy security Energy Security Trust energy storage enforcement engine Engine Development engine problems Engine/Fuel Co-optimization engineering England enhanced oil recovery (EOR) entrepreneur environment environmental attributes environmental impact study (EIS) environmental justice/socially inclusive environmental policy Environmental Quality Incentive Program (EQIP) Environmentalists Enzymatic enzymatic conversion enzymatic depolymerization enzymatic hydrolysis enzyme production enzyme recycling Enzyme solicitation enzymes EPA (Environmental Protection Agency) EPACT (Energy Policy Act) Equatorial Guinea equipment eRINs/electric pathway Eritrea erosion control EROWI (Energy Return on Water Invested) ESG (Environmental Social Governance) esterification Estonia Eswatini/Swaziland ETBE (ethyl tert-butyl ether) etha ethane ethanol ethanol benefits ethanol blend wall ethanol blended diesel ED ethanol blends/ethanol flex fuels ethanol emissions ethanol ether diesel fuel ethanol fire ethanol fuel cells ethanol hybrid ethanol pipeline ethanol prices ethanol production ethanol pumps ethanol tax ethanol terminal ethanol to gas ethanol tolerance ethanol-fueled aircraft Ethanol-to-Gasoline (ETG) ethanol/bioethanol ethanol/diesel ethanol/methanol synthesis ethanol2G Ethiopia Ethiopian mustard ethyl levulinate (EL) ethylbenzene ethylene ets eucalyptus Euglena European Emissions Trading System (ETS) European Union (EU) eutrophication executive order executive order--state Extended Range Electric Vehicle (EREV) externalities extremophiles f F Factor F-24 F-34 F-76 (Marine Diesel) F-T FAEE FAEE (fatty acid ethyl esters) Fair trade False Claims Act FAME (Fatty Acid Methyl Ester) Farm Bill Farm Bureau farm equipment farm policy Farm to Fleet Farm to Fly farmers farming farnesane farnesene Fats fecal sludge Federal Aviation Administration (FAA) Federal Bureau of Investigation (FBI) Federal Emergency Management Agency (FEMA) Federal Energy Regulatory Commission (FERC) Federal Highway Administration (FHWA) federal land Federal Railroad Administration Federal Reserve Bank Federal Trade Commission (FTC) Federal Transit Administration (FTA) feed Feed In Tariffs (FIT) feed prices Feedstock Flexibility Program for Bioenergy Producers feedstock logistics feedstock material feedstock prices feedstock storage feedstock terminal feedstock transportation Feedstocks fermentation ferry fertilizer fiber Fiji Financing Finland Fischer-Tropsch Synthetic Kerosene with Aromatics (FT-SKA) Fischer-Tropsch Synthetic Paraffinic Kerosene (FT-SPK) Fischer-Tropsch Synthetic Paraffinic Kerosene with Aromatics (FT-SPK/A) Fischer-Tropsch/FT fish feed fish oil fish waste fit for purpose Fixed Base Operator (FBO) flameleaf sumac flavors flax fleet turnover Fleets fleshings flex-fuel vehicles (FFV) flight tests Flightpath flixweed/tansy/herb-Sophia flood-prone soil Florida flue gas FOG (Fats/Oils/Grease) follow-the-crop food Food and Agriculture Organisation (FAO) Food and Drug Administration (FDA) food and fuel food policy food prices food processing waste food safety food security food vs biomaterials/bioplastics food vs fuel food waste for forage forage sorghum forecasts foreign oil Foreign Policy forest Forest Biomass for Energy forest biotechnology forest residue/waste Forest resources Forest Service forestry forklifts Formate formic acid fossil carbon fossil fuel Frace fracking fractionation fragrance France franchise fraud free fatty acids (FFA) Freedom of Information Act (FOIA) freight/cargo French French Guiana fructose fruit FT-SKA fuel fuel additives fuel cell electric vehicle (FCEV) fuel cells fuel economy fuel efficiency fuel injection fuel mixtures fuel 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glycerin glycerin standards glycerol goats gorse Governance practices) Government Accountability Office (GAO) government investment government resources government subsidies grain sorghum/milo grain speculators grains GRAND-AM grants grants-local grants-state grapefruit grapes graphene graphite GRAS (generally regarded as safe) Grasses grasshoppers grease Great Green Fleet Great Lakes Greece green bonds green chemistry Green Deal EU green economy green house facility Green Jobs Green New Deal Green Racing Green Recovery green/black economy Greenland GREET Greenhouse Gases Regulated Emissions and Energy Use in Transportation Model Grenada gribble growers gua beans Guam guar Guatemala Guava Seed guayule Guerbet reaction Guinea Guinea Bissau Gulf states gulmohar Gumweed (grindelia squarosa) Guyana GWP gypsum h hairy vetch Haiti Halophytes harvest site processing harvesting Hawai'i hay hazardous waste hazelnut HBIIP Higher Blends Infrastructure Incentive Program HDCJ HDO-SAK (hydro 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