Rotterdam climate adaptation program produced $4.70 in public health savings per $1 invested, including reduced heat mortality, air quality, and mental health outcomes.

Submitted by CoBenefit Lab May 23, 2026 Estimated range: $3–$8 per $1

Consensus pending. Cooling ends 5/30/2026.

Community Evaluations (6)

Rafael Mendez $600M–$1.5B

Infrastructure NPV analysis of drainage systems.

Ahmed Hassan $800M–$2B flood damage reduction

Primary research from Lagos communities.

Fatima Hassan $400M–$1B

Health outcome monetary valuation only.

UrbanResilienceAfrica $1B–$3B

Regional comparison with Nairobi and Accra programs.

James Okafor $700M–$1.8B

Multi-method cross-verification.

NigerianClimateData $1.2B–$4B

Broader scope including economic productivity.