The real problem is man made oxygen
Here is a simple way to overload the warmunists and possibly cause their heads to pop. Just have them answer the following:
1. Define the correct temperature range for the planet.
2. Define the correct humidity range for the planet.
3. Define the correct mean sea level for the planet
4. Define the correct amount of precipitation for the planet.
5. Define the correct makeup of the atmosphere.
6. Define the correct amount of sea ice at the N/S poles.
7. Define/explain past glaciation and subsequent warming without any input from humans.