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.
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
March 31, 2010
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.