B. an increase in atmospheric CO₂
Global warming:
Reasons behind increased global temperatures can be:
- It is the gradual heating of Earth's surface, oceans and atmosphere, is caused by human activity, primarily the burning of fossil fuels that pump carbon dioxide (CO₂), methane and other greenhouse gases into the atmosphere.
The main driver of climate change is the greenhouse effect.
- Industrial Activity
- Agricultural Activity
- Global warming is the current rise in temperature of the air and oceans. It happens because humans burn coal, oil and natural gas, and cut down forests.
Thus, the correct option is B.
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