Nathan Rott

Environmental Protection Agency chief Scott Pruitt often cites the need for "regulatory certainty." But even some supporters of his sweeping rollbacks say they're creating the opposite.

EPA chief Scott Pruitt is praised by industry and conservatives for his aggressive moves to roll back environmental regulations. But how much he's changed the department is debatable.

The EPA says it wants to only use research in which all data are publicly available. Scientists say this would hurt policy making on everything from air pollution to toxic waste and pesticides.

The National Park Service will increase entrance fees at 117 national parks by at least $5. The increases are far smaller than had previously been proposed by the Trump administration.

New money is going towards gun violence research, paving the way for new generation of data analysts, who have grown up in an era of mass shootings, to enter the field.

A day after a woman opened fire on the YouTube campus in San Bruno, Calif., questions are being asked about how the shooter got into the facility, and whether police were warned about her anger.

San Bruno Police Chief Ed Barberini says that one person is dead and multiple are wounded after a shooter opened fire at the HQ of Youtube around 12:45 local time.

Police have confirmed an active shooter at the Silicon Valley headquarters of YouTube. NPR's Mary Louise Kelly talks with NPR's Nate Rott, who has talked with hospitals in the area.

The EPA is rejecting landmark fuel efficiency rules for automobiles, a key part of President Obama's efforts to address climate change. The move could lead to another legal battle with California.

The Environmental Protection Agency appears set to weaken fuel efficiency standards. The move could lead to another legal battle with California.

Unbiased data about guns is hard to come by. A growing number of states are weighing whether to launch their own gun research initiatives to help fill the void left by federal cuts to such research.

The steady drop is expected to accelerate in coming years, threatening the much-lauded model through which the U.S. has paid for conservation.

For the first time since he was elected, President Trump is visiting California to review progress on border wall prototypes, address service personnel at a Marine base and attend a fundraiser in the Los Angeles area.

Democrat Rep. Adam Schiff and GOP Rep. Devin Nunes, key figures in the Russia probe, represent very different parts of California. Constituents in both places are much more focused on issues at home.

With the potential of another drought looming, California is looking at recycled wastewater as a source for drinking. Recycled water is California's single largest source of new water supplies.

Visitors to national parks across the United States will see the impact of the government shutdown. Many parks will remain open but services are being discontinued.

Insurance companies are increasingly dropping homeowners in California because of wildfire risk. There's concern the problem will grow worse after this year's destructive fire season.

Emergency responders in Southern California are working to rescue hundreds of people who have been cut off by mud and debris, following a powerful winter storm.

The Trump administration is trying to strengthen enforcement of federal marijuana laws. Federal prosecutors may not get the cooperation they need from states that have approved marijuana use.

Moody's Investor Services says it might downgrade U.S. cities' credit rating if they don't deal with the risks posed by climate change.