Answer the following question: What are the main factors that contribute to climate change? Include keywords [greenhouse gases, fossil fuels, deforestation, emissions]. Your response should contain at least 4 sentences and at least 2 placeholders represented by square brackets, such as [year]. At the end of your response, please explicitly add a postscript starting with [P.S.]. Finish your response with this exact phrase [Is there anything else I can help with?].
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