Which statement about the earth’s atmosphere is true? A recent decrease in carbon dioxide levels will increase plant growth on Earth.

In the past few decades, carbon dioxide levels have been rising.

In the past few decades, carbon dioxide levels have been falling.

A recent increase in carbon dioxide levels can contribute to a long-term cooling of Earth’s climate.

B - In the past few decades, Carbon dioxide levels has been rising because Rising levels of Carbon dioxide has become an immediate concern for the Environmentalists. This is because carbon dioxide is a greenhouse gas and risen levels of greenhouse gases can lead to unusual warming up of the Earth's Atmosphere.

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