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Carbon dioxide (CO?) is one of the so-called greenhouse gases. These gases hold heat energy in the atmosphere, which raises the overall temperature of the Earth. This helps maintain the Earth's biosphere, but also has led to environmental concerns. The more CO? in the atmosphere, the higher the Earth's average temperature will be. What is another way in which human activity is increasing the amount of atmospheric CO?, and what are potential global effects of these changes in CO, levels?
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