by Lucie Aubourg © Agence France-Presse WASHINGTON, United States (AFP) — In an effort to ease Americans’ pain at the gas pump, President Joe Biden has announced his administration will ease restrictions on the sale of E15 — gasoline that includes 15 percent ethanol — and new investments in biofuels as a whole. But the decision hasn’t pleased scientists who study the environmental impact of ethanol. What is ethanol? Fuel ethanol is based on the […]