Heidi, I do hope you are joking.
You also should realize that dogs literally evolved eating human waste, and by human waste I mean trash and unwanted food, and also quite literally human waste. Insects, mice, rotting carcasses. Domestic chickens and beef cattle were never on the menu, until recently.
I'm not going to be dragged into a global warming "debate", all you need to do is read the latest US Gov't report on climate change to find plenty of facts and evidence to demonstrate that anthropogenic greenhouse gases are causing the global temperature to warm at a pace that is far more rapid than any seen during the 10,000 or so years of human civilization. Humans have been around far longer than 10,000 years, but not enjoying anywhere near the standard of living we now take for granted, and at much smaller numbers living a hunter-gatherer lifestyle, with most of us dying as infants or toddlers, and old age being around 25- 30.