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President Donald Trump arrives to announce the Environmental Protection Agency will no longer regulate greenhouse gases

19 years ago, the Supreme Court told EPA it could regulate climate pollution. Trump is trying to undo that

By Ella Nilsen, CNN (CNN) — Last week, the Trump administration delivered a catastrophic blow to US climate policy by repealing the longstanding scientific finding that planet-warming pollution poses a danger to humans. Getting to this point was one of the administration’s most audacious deregulatory goals. But it doesn’t represent a complete success — yet.

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Traffic backs up on northbound Interstate 405 during the morning commute at sunrise on January 15

Trump delivers a deadly blow to EPA’s ability to regulate climate pollution

By Ella Nilsen, CNN (CNN) — The Trump administration delivered a deadly blow to longstanding US climate policy on Thursday, finalizing rules that revoke the Environmental Protection Agency’s ability to regulate climate pollution. First issued in 2009, the endangerment finding determined that six greenhouse gases could be categorized as dangerous to human health under the

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A recently discovered photograph may be the only one depicting 19th century astronomer Richard Carrington.

He witnessed the sun’s power ‘like nobody else before or since.’ Now his first portrait has been found

By Ashley Strickland, CNN (CNN) — When solar storms erupt from the sun and reach Earth, their intensity is measured against a historical benchmark: the Carrington Event. Now, a portrait of 19th century British solar astronomer Richard Carrington has been discovered — providing, at long last, an image of the man for whom the event

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Scientists used a new technique to estimate the abundance of hydrogen in Earth’s core.

New experiments show Earth’s core may hold vast ‘oceans’ of an essential element for life

By Mindy Weisberger, CNN (CNN) — Picture all of Earth’s oceans, which cover about 70% of the planet and are mostly made of hydrogen. Now multiply that by nine. That may be the amount of hydrogen in Earth’s core, possibly making it the planet’s largest hydrogen reservoir, researchers recently estimated. And nine hydrogen “oceans” is

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