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The World Has Passed A Dangerous CO2 Pollution Threshold, But Climate Deniers Still Push U.S. Inaction

The month of September 2016 marks the first time in human history that CO 2 levels in the atmosphere topped 400ppm in all recorded areas. In fact, CO 2 levels have not been that high since dinosaurs ruled the earth. And that’s not even the bad news. According to scientists, the human race may never see carbon dioxide levels drop below this dangerous threshold. Just three years ago, CO 2 levels passed the 300ppm threshold, and predictions suggested the 400ppm level was many, many years down the road.
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