Climate scientist Michael MacCracken explores some of the scientific, legal, and ethical implications of "geo-engineering" options that have been proposed by some people to address global climate change.

Climate Change 2007: Mitigation of Climate Change

A comprehensive scientific assessment providing an in-depth analysis of the costs and benefits of different approaches to mitigating and avoiding climate change.

Limiting the Magnitude of Climate Change

Meeting internationally discussed targets for limiting atmospheric greenhouse gas concentrations and associated increases in global average temperatures will require a major departure from business as usual in how the world uses and produces energy. This report from the America’s Climate Choices suite of studies recommends that a U.S. policy goal be stated in terms of a budget for cumulative greenhouse gas emissions over the period 2012 to 2050.

Transportation's Role in Reducing U.S. Greenhouse Gas Emissions

This U.S. Department of Transportation report, submitted to the U.S. Congress in April 2010, evaluates a range of strategies for reducing greenhouse gases from transportation including: introducing low-carbon fuels; increasing vehicle fuel economy; improving transportation system efficiency; aligning transportation planning and investments to achieve GHG reduction objectives; and pricing carbon.