The world has been warming since the middle of the 19th century. Human-caused warming has become the dominant cause of warming since roughly WWII. The core consensus of climate scientists, proven by a bizarre number of studies (pouring more water on a rock doesn’t make it wetter), was clearly stated in the Summary of Policymakers by Working Group I of the IPCC’s Fifth Assessment Report.
“It is extremely likely (95 – 100% certain) that human activities caused more than half of the observed increase in global mean surface temperature from 1951 to 2010.”
Summary: Let’s take a break from political bickering to see how fast the Earth is warming. Just the facts, please.