The dramatic increase in average global temperature that the climate has undergone in recent centuries- and even moreso in recent decades- is the result of human activity.
because
score: 1
CO2 is a greenhouse gas. The CO2 level since the industrial revolution has shot through the roof, well beyond any time in the past 400-800 thousand years (i.e. long before homo sapiens existed). This would be expected to increase Earth's temperature.
There is tons of existing evidence. What I hoped is that people could share information they know, and we could have a debate weighing that evidence in a scientific fashion.
daft_monk
