There is overwhelming scientific agreement that human activities are changing the global climate system and these changes are already affecting human and natural systems. The observational record shows that the planet is getting significantly warmer, with eighteen of the nineteen warmest years on record occurring since 2001. Other observed changes include rising sea levels, ocean warming and acidification, melting sea ice, thawing permafrost, increases in the frequency and severity of extreme events, and a variety of impacts on people, communities, and ecosystems. There are multiple lines of evidence linking these changes to anthropogenic influence on climate.
Environmental Law | Law
Michael Burger, Jessica A. Wentz & Radley Horton,
The Law and Science of Climate Change Attribution,
Colum. J. Envtl. L.
Available at: https://scholarship.law.columbia.edu/sabin_climate_change/58