IAMPACT is a cutting-edge research tool that helps answer one of the most important questions in climate policy: “Is investing in climate action today worth the cost?”.

The program combines climate science with economic analysis to calculate the costs and benefits of reducing greenhouse gas emissions, providing policymakers with the quantitative evidence needed to make informed decisions about climate policy.

Climate Impact Assessment
IAMPACT relates temperature changes and economic growth to project how climate change will affect the global economy. The tool incorporates multiple research approaches, including:

• Empirical models showing how higher temperatures reduce economic productivity
• Different impact estimates for developed versus developing countries (since poorer nations are more vulnerable)
• Thousands of simulations to account for scientific uncertainty

Economic Cost-Benefit Analysis
The program calculates the net benefits of climate action by comparing:

• Benefits: Economic damages avoided by limiting temperature rise
• Costs: Expenses of implementing climate policies (renewable energy, carbon pricing, etc.)

Key Insights
IAMPACT’s analyses typically show that:

• The economic benefits of climate action often outweigh the costs
• Developing countries face higher climate damages but can also receive larger benefits from mitigation support
• Acting now is generally more cost-effective than delaying action
• Uncertainty exists, but climate action remains economically sound across most scenarios

IAMPACT represents a collaborative effort to provide transparent, reproducible analysis of  climate economics using the latest scientific research and computational methods.