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Key elements include a requirement that would cut the power industry's carbon pollution by 32 percent below 2005 levels in the next 15 years.

A huge legal battle is coming over the White House plan to address climate change with additional power plant regulations. The coal industry has the most to lose, and plans to take the EPA to court.

The federal rules will deal a big blow to some energy sectors — especially coal. The change won't be so hard for states that have moved to cut emissions. But for others it will be more difficult.

Some companies think microalgae could be the alternative protein of the future, but can it top plant proteins?

A meta-analysis found that people on vegetarian diets lost around 4.4 pounds more than the control group who had no change in diet. Those who tried a vegan diet dropped 5.5 pounds more.

NPR's Audie Cornish speaks to Andrew Zimbalist, author of Circus Maximus: The Economic Gamble Behind Hosting the Olympics and the World Cup, about cities' reluctance to host the Olympics.

Legally, a single fish species can go by many names from sea to plate, and different fish can go by the same name. An environmental group says that hampers efforts to combat illegal fishing and fraud.

Officials hope an ambitious plan to divert the Mississippi River will revitalize the wetlands that are a natural buffer against storms and floods. Opponents say the changes will upset local habitats.

The spill on Wednesday sent heavy metals, arsenic and other contaminants into a waterway that flows into the San Juan National Forest. Estimates of the spill's size have risen sharply since then.

An EPA-supervised cleanup crew inadvertently leaked 3 million gallons of orange-colored toxic wastewater.