gsaPosition Statement. "Decades of scientific research have shown that climate can change from both natural and anthropogenic causes. The Geological Society of America (GSA) concurs with assessments by the National Academies of Science (2005), the National Research Council (2006), and the Intergovernmental Panel on Climate Change (IPCC, 2007) that global climate has warmed and that human activities (mainly greenhouse‐gas emissions) account for most of the warming since the middle 1900s." (read more...)

The Geological Society of America is the largest association of geoscientists in the world, comprising 22,000 members in 97 countries. Geoscientists have studied climate longer than any other group of scientists. We study climate of the past, present and future, the causes of climate change, and the impacts on both the human and natural worlds. We are in agreement that the Earth's climate has warmed in the 20th century, that human emission of greenhouse gases is the major cause, and that a future of continued warming is a grim one. THE SCIENTIFIC COMMUNITY IS NOT DIVIDED ON THIS ISSUE.

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