Patently untrue. Global Climate Change is an ongoing event that has and always will occur on our little planet.
Evidence shows that Earth has gone from being totally frozen (Snowball Earth existed) to having no polar ice caps and all climatological areas in between.
The insanity is in people trying to fool others into believing that we humans have any control over this process. However, once you realize that those same people believe that they are more powerful than God and Mother Nature combined, then you begin to understand their mentality.