And in fact we are CURRENTLY in an ice age. Few seem to know that. When not in an ice age it has been MUCH warmer. We're currently in an interglacial period within the current ice age. All inconvenient facts not taught in school...
The problem with the climate change religion is it's adherents don't want to hear facts.
Most people don't know that water vapor accounts for 70-90% of any warming.
Also, we are currently in a carbon deficit. During the Cambrian era we had 8000 ppm CO2 and today we only have 400ppm CO2. It was as low as 180ppm before the trend started to reverse. In the last 70 years we've gone from 330 ppm CO2 to a little over 400 ppm but we haven't seen any real gain in warming.
Further, if CO2 drops below 150ppm terrestrial plant life will not survive.
Finally, more CO2 means more greening of the world because CO2 is the primary food of plants.