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Environmental Science

Why Environmental Impact Assessments Underestimate Cumulative Effects

Quick fact

A landmark study found that in 40% of U.S. environmental impact statements, cumulative effects are either not analyzed or are dismissed with a vague statement, such as 'no significant cumulative impact.'

Why this is interesting

Imagine several small scratches on a window—each seems harmless, but together they obscure the view. Similarly, many small developments can collectively destroy an ecosystem, yet each one is approved because it alone seems negligible.