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Carbon dioxide (CO2). This is the one that is largely contributing to global warming, and it's the one that we can possibly do something about, by reducing our burning of fossil fuels and by stopping deforestation.

Other greenhouse gases are more powerful, like methane, but the amount so far is small compared with CO2.

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12y ago
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11y ago

Scientists are concerned specifically about carbon dioxide, because it is a greenhouse gas which affects the climate of the Earth.

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Q: Are scientists most concerned about the gases that have increased by the greatest percentage?
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