Umm yes there is a scientific consensus that climate change is occurring and is man made. Pretty much all scientists have known about this for years. Scientists knew the earth was warming even in the 70's. It is was just random journalist talking about the ice age stuff to sell papers, and most scientists then knew about global warming and knew the earth wasn't cooling. Also the Y2K thing was a real concern but people fixed all the problems.
Climate change is real and it is quickly getting to the point where we can do little to change things back. It will likely result in millions, perhaps billions of deaths. However it is mostly going to be due to famine and stuff in Africa and Asia, and lets be honest here. People in the US don't give a shit if a billion people die over seas due to climate change. That is why as a country we are not doing very much.
It is already predicting that hundreds of thousands of people are dying every year from the impact of climate change we are already experiencing, and we are still pretending that nothing is happening. So it is a pretty fair assessment to say that people are not going to get their act together any time soon. We will probably be well into a billion deaths before people start taking it as a serious threat and by then, there isn't going to be any way to stop it. We are just going to have to live through the harsh weather conditions and reduced water supplies.
All that said, I don't think humans are going to get wiped out. People will move to Canada, which will have a much warmer weather, making it a nice place to live and grow crops and we will pay the costs to put desalination plants along the coast to get water. It will suck, especially for the overpopulated areas that are already poor, but I really don't think this stuff will kill off humans.
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