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The document outlines how scientists use climate models, atmospheric records, and carbon isotope signatures to prove that human-induced greenhouse gas emissions are the primary driver of global warming since the mid-20th century. It highlights the consensus among the scientific community and major bodies like the IPCC, while noting that attribution science can now link specific extreme weather events to climate change.

In a statement to the U.S. House Committee on Energy and Commerce, World Resources Institute President Jonathan Lash advocates for immediate national climate legislation. He cites accelerating climate impacts, such as record Arctic sea ice loss and pine beetle outbreaks in British Columbia, as evidence of the need for urgent action. The statement proposes an economy-wide, market-driven cap-and-trade program combined with investments in energy efficiency, grid modernization, and carbon capture to stimulate economic growth and ensure technological competitiveness.