The Stanford Environmental and Energy Policy Analysis Center (SEEPAC), a joint venture of SIEPR and the Precourt Institute for Energy at Stanford, uses the tools of economics, other social sciences, and natural science to examine the critical environmental and energy issues of the 21st Century. Climate change is a central focus. SEEPAC researchers study the environmental policy decisions societies make, including what energy sources to use, and how to foster sustainable economic growth, preserve the diversity of the natural world, and balance regulatory and market-based protection. SEEPAC connects basic science and policy by investigating how environmental programs affect the economy and the fabric of society. SEEPAC scholars work closely with scientists, engineers, and policymakers to come up with politically realistic, economically viable approaches to safeguarding the environment.