evidence: Blaming every major weather disaster on man-made global warming defies common sense, as well as the historical data record. [...] "Claim: Climate scientists disagree about how much warming is associated with our emissions and whether this warming is larger than natural climate variability from the sun and volcanic eruptions" "Key takeaway: Scientific evidence shows that modern global warming is primarily driven by increasing CO2 emissions from human activities. There is no evidence that solar variations or volcanic activity are substantial drivers of recent climate change."