Greenhouse Gas Emissions

• U.S. Helped to Weaken Report at U.N. Environment Talks, Participants Say - American officials joined Russia, Saudi Arabia and Iran in objecting to language on fossils fuels, biodiversity and plastics in a report that was three years in the making.
• Starting With Formaldehyde, Trump Administration Reassesses Chemical Risks - A draft memo from the E.P.A. assumes a safe threshold exists for formaldehyde, upending earlier findings that there is no safe level of exposure to the carcinogen.
• Trump Returns to Gasoline as Fuel of Choice for Cars, Gutting Biden’s Climate Policy - The president said he would weaken Biden-era mileage standards, which were designed to increase electric-vehicle sales, calling them a “scam.”
• Many Fighting Climate Change Worry They Are Losing the Information War - Shifting politics, intensive lobbying and surging disinformation online have undermined international efforts to respond to the threat.