One thing to keep in mind about the "man-made" global warming…

No one is saying that mankind is the cause of global warming itself. Earth was going through climate change cycles long before mankind inhabited the land. What people/scientists are citing as "man-made" is the fact that this cycle of climate change seems to be progressing much, much faster than any others researched.
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“Hiking is just walking where it’s okay to pee. Sometimes old people hike by mistake.” — Demitri Martin