Katharine Hayhoe: Here’s How Long We’ve Known About Climate Change

“Thanks to all the coal, oil and gas we’ve burned since the Industrial Revolution, we’re heading into unknown territory—unknown, that is, since the time of the dinosaurs, when there weren’t any ice sheets, when the sea level was more than 300 feet higher than today and when the land where a third of the people on this planet currently live would’ve been under water.”

Source: Katharine Hayhoe: Here’s How Long We’ve Known About Climate Change

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