The climate has been changing since the beginning of time. In the '70s or '80s, scientists were predicting another ice age.
I was there in that time. I remember reading an article in a major news magazine that "scientists" were considering the idea of covering the north and south poles with soot so as to diminish the "radiation of cold" from the ice.
Fast forward to perhaps within the last decade and "scientists" were considering the option of sending mirrors into space to "reflect back the sun's rays."
I don't even have a college degree and I think I'm smarter than that...