This group of elder statesman evidently doesn't believe that the "science is settled"

An Open Letter On America's Energy Future

Invest in Climate Science to Guide Energy, Economic, and Environmental Policy

A deeper understanding of the issues and developing science associated with the environment and climate change will influence national and global energy, economic, and environmental policy choices. Balancing these priorities requires greater consideration of the complex processes driving climate change and increased attention to adaptation measures. We must increase our investment in climate science, which will enable us to adjust policies as scientific understanding advances. At the federal level, we need better coordination and collaboration across agencies for policy coherence and balance.