The federal Clean Air Act and associated environmental regulations have driven steep declines in air pollution emissions over the past several decades, even as U.S. manufacturers increased production, a study by two University of California, Berkeley, economists has shown.

More than 6.1 million people worldwide die each year as a result of exposure to air pollution, which increases the risk of cardiovascular disease, lung disease, and cancer.

Dry months are getting hotter in large parts of the United States, another sign that human-caused climate change is forcing people to encounter new extremes.

In a study published today in Science Advances, researchers at the University of California, Irvine report that temperatures during droughts have been rising faster than in average climates in recent decades, and they point to concurrent changes in atmospheric water vapor as a driver of the surge.

New IIASA-led research has found that a single climate mitigation scheme applied to all sectors, such as a global carbon tax, could have a serious impact on agriculture and result in far more widespread hunger and food insecurity than the direct impacts of climate change. Smarter, inclusive policies are necessary instead.

The financial costs of flooding in Canada’s maritime region could spike by 300 per cent by the end of the century if steps are not taken to address the impacts of climate change.

When carbon dioxide is absorbed by seawater carbonic acid is formed, making the water more acidic. Since the Industrial Revolution, oceanic CO2 has risen by 43% and is predicted to be two and a half times current levels by the end of this century.

States that require utilities to increase renewable energy see an expansion of renewable energy facilities and generation -- including wind and other renewable sources, but especially solar -- according to new research from Indiana University and two other institutions.

The air in US national parks contains just as much ozone pollution as the air in many of the country’s largest cities, according to a study published on 18 July in Science Advances.

The spring morning temperature in landlocked northern California warns of an incipient scorcher, but the small herd of piebald dairy cows that live here are too curious to care. Upon the approach of an unfamiliar human, they canter out of their barn into the already punishing sun, nosing each other aside to angle their heads over the fence. Some are black-and-white, others brown; all sport a pair of numbered yellow ear tags. Some are more assertive than others. One manages to stretch her long neck out far enough to lick the entire length of my forearm.

Climate change poses a serious threat to the United States’ internet infrastructure, with more than 4,000 miles of fiber optic cable expected to be under water within 15 years from just 1 foot of sea level rise, according to a new analysis by scientists at the University of Oregon and University of Wisconsin-Madison.