Combined with the fact that in recent pre-industrial times we were in a little ice age. Which it can be argued we are still coming out of.
Intelligent people may agree that global temperatures are rising.
Where the intelligent people part ways with the others, is when they put forth man-caused CO2 levels as the culprit and demand that we destroy our economy and way of life to combat it by reducing CO2 levels.
We have several Freepers who wonder why the Leftists never answer the astute question:
“What temperature SHOULD the globe be?”