Cumulative Impact Analysis in NEPA Climate Assessments

Abstract

This article argues that CI analysis is a critical tool for addressing global warming. This is because the largest anthropogenic sources of greenhouse gas (“GHG”) emissions in the U.S. each contributes a vanishingly small portion of global GHG emissions, which alone cannot rise to NEPA’s threshold of “significance” requiring a “detailed statement…on the environmental impact of the proposed action,”i.e., an environmental impact statement (EIS). Yet there is no pollution today in greater need of assessment and understanding than GHG emissions, given the urgency of the impending catastrophe that global warming could mean for our planet.