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What major factors play a role in global warming? A. decrease in human activity and normal climate conditions
B. natural factors and human activity
C. natural factors and normal climate conditions
D. decrease in human activity and natural factors
The correct answer is B. natural factors and human activity.
Explanation: Global warming is primarily caused by the increase of greenhouse gases in the atmosphere due to human activities such as burning fossil fuels, deforestation, and industrial processes. Additionally, natural factors like volcanic eruptions and variations in solar radiation also contribute to changes in the Earth’s climate. Therefore, both human activity and natural factors play significant roles in global warming.