The short answer is yes. The Intergovernmental Panel on Climate Change reports that Earth's global mean temperature has increased 1.1° C since 1880, and it is due to human greenhouse gas emissions. The IPCC is a politically independent organization created by the UN, and its members volunteer their time. It is made up of the smartest climate experts on the planet, and 120 governments from the UN. The IPCC does not conduct its own studies, instead it reviews the latest scientific literature and forms a consensus. The Summary for Policymakers, an abstract at the beginning of every IPCC report, is reviewed line by line and approved by all 120 government entities as being veritable fact. At every turn, the IPCC is transparent about its confidence in its findings. It is true to the scientific method: each new report is the latest and most accurate information available. Visit the IPCC's website and download the latest report here.