Hydrogen, for example, is not a greenhouse gas, but CO2 is. What’s the difference? CO2, like other greenhouse gases, has a molecular structure that makes it more sensitive to the heat that the Earth absorbs from the sun and reflects back into the atmosphere, creating thermal radiation. CO2 molecules react to this radiation, causing them to vibrate and bend and jitterbug. As more greenhouse gases accumulate in the atmosphere, the jitterbugging in the sky above us accelerates. That’s why, as we burn fossil fuels and release CO2 molecules into the atmosphere, our world is heating up. The sky is
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