The United Nations weather agency said carbon dioxide levels in the atmosphere reached record highs last year, intensifying climate change and extreme weather. The World Meteorological Organization said CO2 growth rates have tripled since the 1960s, reaching levels that existed 800,000 years ago. The report, released Wednesday, highlights emissions from coal, oil, and gas, along with wildfires, as major contributors. Despite flat fossil fuel emissions last year, CO2 levels continue to rise. The agency has urged policymakers to reduce emissions, warning that the world is heading into a dangerous state. Other greenhouse gases like methane and nitrous oxide have also hit record levels.

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More than $100 million in Proposition 4 funding — a $10 billion climate bond passed by voters last year — will go to California’s coastal resi…

President Donald Trump's administration has proposed revoking a scientific finding that's long been the central basis for U.S. action to regulate greenhouse gas emissions and fight climate change. The proposed Environmental Protection Agency rule rescinds a 2009 declaration that determined carbon dioxide and other greenhouse gases endanger public health. The "endangerment finding" is the legal underpinning of a host of climate regulations under the Clean Air Act for motor vehicles, power plants and other pollution sources. EPA Administrator Lee Zeldin announced the proposed rule change on a podcast ahead of an official announcement set for Tuesday in Indiana. Three former EPA leaders say Zeldin's proposal would endanger the lives of millions of Americans.

The United Nations' top court in a landmark advisory opinion says countries could be in violation of international law if they fail to take measures to protect the planet from climate change, and nations harmed by its effects could be entitled to reparations. Advocates immediately cheered the International Court of Justice opinion on nations' obligations to tackle climate change and the consequences they may face if they don't. Notably, the court said a "clean, healthy and sustainable environment" is a human right. That paves the way for other legal actions, including states returning to the ICJ to hold each other to account as well as domestic lawsuits.