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Which two human activities are believed to be the greatest contributors to global warming?

nonnative species introduction and the burning of fossil fuels
deforestation and the burning of fossil fuels
deforestation and nonnative species introduction
non-sustainable harvesting and nonnative species introductio

User Tnwei
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Answer:

B

Step-by-step explanation:

well deforestation is ruining are forests and burning fossil fuels is pollution

User Kaladin
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