Archeological scientists believe that a huge asteroid struck our world eons ago, causing a cloud of dust that covered the whole planet for a long period of time. This destroyed plant life, which needs sunlight to grow, and that destroyed the dinosaurs and all other creatures because there was no food available.
Much has been written about the cause of global warming. There are those who blame it on human activities. We know that there was an ice age eons before man appeared on Earth. This means that the warming has been going on long before our time. Some ice still remains in our polar regions, but it is disappearing rapidly.
There is reason to suppose that the sun may have its own orbit, which takes many eons to complete. Then cooling should commence once more until it creates another ice age. This makes it appear that our emotional reactions probably have little to do with reality. Who knows how warm it will get, and how we might cope with it?