Because our planet's climate is always changing,the key question becomes,how much of global warming is caused by human activities versus natural climate variability? On this issue,most scientists agree that the causes are mainly

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The term "anthropogenic" refers to human activities such as burning of fossil fuels that are causing global warming. Most scientists agree that the primary cause of global warming is anthropogenic. Options A, B, D, and E are not relevant in explaining the causes of global warming.

Because Our Planet's Climate Is Always Changing,the Key Question Becomes,how