If current trends continue, the projected increase in global temperature by the end of the twenty - first century will result in large negative impacts on humans and other life forms. (rabett.blogspot.ru)
That would result in an average rise in global temperatures of between 2 °C and 3 °C by 2100. (climatenewsnetwork.net)
Multiple factors (forcings and feedbacks) account for the changes in global temperatures over that timeframe. (skepticalscience.com)