On the one hand, some people believe there is no such thing as climate change. I know some of those people. They are ones making jokes when it is cold outside and saying things like "Climate change, my ass. Tell that to this snowball."
On the other hand, some scientists think it could be much worse than previously reported...during the lifetimes of our kids.
This New York Magazine story will keep me up at night. It's called "The Uninhabitable Earth". Nothing to worry about except for: "Famine, economic collapse, and a sun that cooks us"