The 'original' data that the global warming argument is based on was never verified. The argument is technically still a hypothesis... not even theoretical. Certainly NOT factual.
Long-term (30+ yrs) climate change is determined by Earth's tilt on its axis, its relationship/distance to/from the Sun, and solar activity. Man is incapable of affecting either. Short-term climate change (less than 30 yrs) CAN be affected by asteroid strikes, volcanic events, and nuclear war. Of those, man can only affect one: nuclear war.