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-- OriginalOwner_ [tinyurl.com] writes:

from the we're-officially-toast dept.

Climate Central reports [climatecentral.org]

The last station on Earth without a 400 parts per million (ppm) reading has reached it.

[...]In the remote reaches of Antarctica, the South Pole Observatory carbon dioxide observing station cleared 400 ppm on May 23, according to an announcement from the National Oceanic and Atmospheric Administration [June 15]. That's the first time it's passed that level in 4 million years (no, that's not a typo).

[...]Passing the 400 ppm milestone [...] is a symbolic but nonetheless important reminder that human activities continue to reshape our planet in profound ways. We've seen sea levels rise about a foot in the past 120 years and temperatures go up about 1.8°F (1°C) globally. Arctic sea ice has dwindled 13.4 percent per decade since the 1970s, extreme heat has become more common, and oceans are headed for their most acidic levels in millions of years. Recently heat has cooked corals and global warming has contributed in various ways to extreme events around the world.

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