Climate in Crisis

The world’s top 25 most polluted cities were all in India, Pakistan and China, Swiss air quality monitoring firm IQAir said in its annual report.

The community of Martinez Lake in Arizona hit a jaw-dropping 110 degrees Fahrenheit on Thursday — the highest March temperature in U.S. recorded history.

​​The universities that oversee the National Center for Atmospheric Research allege in the suit that the center is “collateral damage” in the Trump administration’s ongoing feud with Colorado Gov. Jared Polis.

Vineyard Wind was among the offshore wind projects halted last year by the Trump administration, citing national security concerns.

Using a more accurate coastal height baseline means a 3-foot rise in seas could inundate up to 37% more land and threaten 77 million to 132 million more people, researchers said.

The court will hear an appeal brought by Suncor and Exxon Mobil asking it to throw out a lawsuit in Colorado seeking damages for harm caused by the use of fossil fuels.

Coal plants are the largest single human source of mercury pollutants. The mercury emitted later falls in rain or simply by gravity, entering the food chain.

The Obama-era finding underpins nearly all climate regulations under the Clean Air Act.

The agency announced it is repealing its 2009 conclusion that greenhouse gases warm the Earth and endanger human health and wellbeing.

The decision, which established emission standards for cars and trucks, is expected to upend most U.S. policies aimed at reducing climate pollution.

Scientists say snow cover and snow depth are both at the lowest levels they’ve seen in decades.