The Earth permanently passed a global warming threshold last year that alarms climate scientists and has profound consequences for everyone alive today — particularly young people looking forward to the future.
According to the World Meteorological Organization (WMO), observatories around the world found that in 2015 and 2016, the amount of carbon dioxide in the atmosphere crossed the symbolic threshold of 400 parts per million (ppm), and that this is likely to remain the case for the foreseeable future.
This is the highest level ever seen in all of human history and is 144 percent higher than the pre-industrial average. Such a high level is also very likely the highest on record going back to between 800,000 and 15 million years ago, based on various studies. Read more...
More about Science, Greenhouse Gases, 400 Ppm, Extreme Weather, and Global Warmingvia Mashable
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