Many migratory birds, like these sandhill cranes, rely on wetlands for feeding, resting and shelter.
A 2006 Supreme Court ruling created widespread confusion about which wetlands and other waters are federally protected. The Trump administration's latest action isn't likely to clear things up.
Steller sea lions in the eastern Pacific are an Endangered Species Act success story.
David B. Ledig/USFWS
The Trump administration is changing implementation of the Endangered Species Act in ways that conservationists say would reduce protection for some of America's most threatened wildlife.
All together now?
Major US environmental organizations have promised to diversify their staffs and boards for more than 20 years, but moved slowly. Will workplace scandals make a difference?
One use and done? Not always.
Many communities are banning single-use plastic shopping bags to reduce pollution, but a study in California shows that some consumers responded by purchasing more heavy plastic trash bags.
Hoosick Fall, N.Y. is one of many U.S. communities whose drinking water has been contaminated with PFOA or PFOS.
AP Photo/Mike Groll, File
EPA is moving to regulate two chemicals from a group called PFAS that are contaminating drinking water. A public health expert explains why the agency should take much broader action.
President George H.W. Bush (right) fishing on the Kennebunk River in Maine, Aug. 27, 1990.
AP Photo/Doug Mills
George H.W. Bush, who pledged to be 'the environmental president,' took a market-based approach to pollution control that helped clear the air. Now some experts think it could work on climate change.
Environmental regulations generally improve communities’ preparedness and resilience during disasters.
AP Photo/Gerald Herbert
The damage to coal ash sites from Hurricane Florence demonstrates how a community's vulnerability to natural disasters is closely linked to how stringent environmental regulations are.
Rather than fade into the night, coal plants could stick around longer under Trump’s proposal.
Trump's energy plan may meet the letter of the law but the Affordable Clean Energy Plan reflects the administration's clear agenda to move slowly or not at all on climate change.
A clear day at Acadia National Park in Maine.
US national parks protect some of America's most spectacular outdoor settings. But new research shows that ozone pollution levels in the parks are roughly as bad as in major cities.
Protesters at a rally on the state of the EPA organized by the American Federation of Government Employees union, April 25, 2018, in Washington, D.C.
AP Photo/Alex Brandon
Government agencies are supposed to listen to the industries they regulate, but what if they tune out everyone else? Scholars call this regulatory capture, and some staffers see it happening at EPA.
Male sage grouse at the Seedskadee National Wildlife Refuge, Wyoming.
The Trump administration is reopening a plan negotiated under President Obama to protect Western sage grouse. This could signal to states not to bother working together to protect other endangered species.
Smog alert in Cleveland, Ohio, July 20, 1973.
EPA Administrator Scott Pruitt wants to change the grounds for setting US air pollution targets. An environmental lawyer explains why Pruitt's approach misreads the law and could roll back decades of gains.
A streamlined NEPA review of replacing New York’s Tappan Zee Bridge over the Hudson River, which would normally take 3-5 years, was completed in 1.5 years.
Do environmental reviews delay large-scale projects? The Trump administration says yes, but studies show that these reviews lead to better results and can even save time and money.
False-color image of ozone concentrations above Antarctica on Oct. 2, 2015.
NASA/Goddard Space Flight Center
Earth's ozone layer shields us from harmful ultraviolet radiation. Nations have been working to reduce ozone-depleting chemicals since the 1980s, but recent studies show that there is still work to do.
March for Science in Portland, Oregon, April 22, 2017.
The March for Science on April 14 and Earth Day on April 22 are likely to generate big crowds demonstrating against Trump administration policies. Here are some issues they'll be marching about.
One of EPA Administrator Scott Pruitt’s signature moves has been to put the brakes on stringent fuel economy rules.
AP Photo/Andrew Harnik
An academic suing the EPA over its decision to bar certain scientists from serving on advisory boards says the EPA needs to address legitimate criticisms to rebuild after Pruitt.
Healthy aquatic vegetation in the Chesapeake Bay.
Cassie Gurbisz/University of Maryland Center for Environmental Science
An ambitious plan to cut the flow of nutrients into the Chesapeake Bay has produced historic regrowth of underwater seagrasses. These results offer hope for other polluted water bodies.
Utah prairie dog, Bryce Canyon National Park.
Congress is moving to cut back the Endangered Species Act and give more power to states. But a recent study shows that state laws are weaker and states have few resources to protect species at risk.
Coal stockpile at a Milwaukee, Wisconsin power plant, 2011.
A recent study shows that large piles of coal produce measurable quantities of fine particulate air pollution within a 25-mile radius. Covering coal trains and storage piles could reduce the problem.
To comply with air pollution laws, midwest energy companies built tall smokestacks to displace pollutants. This one at Indiana’s Rockport Generating Station is 1,038 feet high, just 25 feet shorter than the Eiffel Tower.
Trump administration officials argue that states can regulate more effectively than the federal government. But without leadership from the top, federalism may allow red states to avoid acting.