Researchers have long experimented with “lean burn" engines, which boost efficiency and reduce emissions. But getting them to ignite is tricky.
Exclusive new emissions analysis shows how much more dangerous SUVs are for the climate than smaller vehicles, and how they have become part of our lives.
California on Monday finalized a legal settlement with five of the world's largest automakers that binds them to comply with its stringent state-level fuel efficiency standards that would cut down on climate-warming tailpipe emissions.
The Environmental Protection Agency's internal watchdog said Monday it had opened an investigation into the agency's weakening of Obama-era regulations that would have limited automobile emissions by significantly raising fuel economy standards.
Researchers find people's exposure to PFAS and certain flame retardants could be significantly reduced by opting for healthier building materials and furniture.
Fish exposed to harmful contaminants can pass on health issues such as reproductive problems to future generations that had no direct exposure.
An expanding wood pellet market in the Southeast has fallen short of climate and job goals—instead bringing air pollution, noise and reduced biodiversity in majority Black communities.
Hunter-donated meat provides crucial protein to US food banks. But an EHN investigation found a lack of oversight that could result in potentially hundreds of thousands of lead-contaminated meals this year.