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Practice Listening: Fill in the Blanks (Type In)
ID: #33482
Short
Weather Change
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What I'm trying to understand, and what other of mine are trying to understand, is how we moved from that cold climate condition to the warm climate condition that we enjoy today. We know from ice core research that the from these cold to warm conditions wasn't smooth, as you might predict from the slow increase in solar radiation. And we know this from ice cores, because if you drill down into ice, you find annual bands of ice, and you can see this in the iceberg. You can see those blue-white layers. Gases are in the ice cores, so we can measure CO2 that's why we know CO2 was lower in the past and the chemistry of the ice also tells us about in the polar regions.
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