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.
Nitrogen and phosphorus are polluting US waters, creating algae blooms and dead zones. New research confirms that voluntary steps are failing in the Gulf of Mexico and unlikely to work in Lake Erie.
Within the next month, the Trump administration may move to abolish or shrink up to two dozen national monuments. Our experts explain why these sites matter and whether presidents can undo them.
The Clean Water Rule spells out which streams, wetlands and other water bodies receive federal protection. The Trump administration wants to repeal it, but will face high hurdles in court.
Defiant against Trump's policies on immigration and environment, California finds itself defending its way of life – the California Dream itself.
As President Trump pulls the US out of the Paris climate accord, China is cutting pollution and dominating clean energy manufacturing. Now it can claim global leadership for those actions.
New research shows that importing goods from low-wage countries has helped US manufacturers shift production to less-polluting industries, produce less waste and spend less on pollution control.
An extensive amount of research has shown a direct link between air quality and fetal and infant health. Cleaner air has saved lives – and money.
Forests are valuable for many uses, including timber, clean water, wildlife habitat and recreation. Stresses on U.S. forests include wildfires, pest invasions and development of private lands.
President Trump's latest executive order weakens or reverses multiple rules and policies designed to slow climate change. Scholars explain the order's impact.
President Trump says environmental regulation kills jobs. To fight back, conservation advocates need to show that protecting the environment can produce jobs and local benefits.
To weigh the economic impact of climate change policies, we need to estimate the social cost of carbon. An economist explains how it's done and why the Trump administration shouldn't end the practice.
President Trump signed an executive order to roll back the 2015 Clean Water Rule. Two water experts explain why the rule alarms farmers and ranchers concerned about over-regulation.
New research shows that exposure to fine particulate air pollution may double the risk of dementia in older women by increasing growth of beta-amyloid plaques in the brain.
Republicans in Congress are working to kill an Obama administration rule that broadens public input into federal land use planning. Hunters, fishermen, hikers and environmental groups are opposed.
California has set ambitious goals for cutting carbon emissions and shifting to a clean energy economy. How will this strategy affect the state's huge economy? An economist weighs the evidence.
Critics say the Endangered Species Act does not work because only about 1 percent of protected species have officially "recovered." Two biologists explain why recovery is so hard to define.
We may picture regulators tying businesses up in red tape, but research shows that many environmental regulators have collegial relationships with the companies they regulate.
If US Rep. Ryan Zinke of Montana is confirmed as interior secretary, he will face difficult choices about balancing extractive activities like energy production with conservation on public lands.
President Obama used an obscure 1953 law to bar offshore drilling in Arctic Alaska and along the Atlantic coast. Republicans and energy companies want to reverse the ban, but it will not be easy.