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Big food companies like Walmart want farmers to reduce greenhouse emissions from nitrogen fertilizer. But the best-known program to accomplish this may not be having much effect.

Today's sealed and insulated houses mean indoor air is often more polluted than the air outside. Cigarette smoke, pet allergens, and fumes from cleaners are increasingly trapped inside, along with chemicals released from insulation, paint and carpeting. NPR's Jon Hamilton reports on what researchers know about indoor air quality.

The Nord Stream pipeline leak might be the single largest release of methane, a powerful greenhouse gas. Experts say it pales in comparison to ongoing methane emissions from the oil and gas industry.

For Tony Sanders, becoming state superintendent was a natural career progression and a “longtime dream.”

A new study shows that when ads made hedonistic marketing claims, such as "exotic" or "delicious," rather than targeting environmental interests, more people were willing to try eating insects.

The Southern Nevada Water Authority launches a plan to build a pipeline connecting Las Vegas with underground wells located 200 miles away. The move would provide Las Vegas with millions of gallons of water, but local farmers and ranchers argue the pipeline would dry up their water source, hurting their livelihood and the environment.

The interior secretary is stepping down after a tumultuous two years, marked by mounting allegations of misconduct in office.

New Orleans is suing oil and gas companies to help it pay for flood protection. It's a major move against an industry that's key to the city's economy.

Last month the Unit 5 school district approved a resignation agreement with its now former director of human resources and student services, James…

Commentator Diana Nyad says she thinks we ought to take a closer look at the ecological impact golf courses have on the environment.