Include twice per year national opinion surveys on issues directly related to climate change and energy policy, as well as other surveys conducted on a range of topics such as hydraulic fracturing "fracking", the Great Lakes, and wider issues of energy and environment. From 2008-2012 the survey was called the "National Survey of American Public Opinion on Climate Change" (NSAPOOC); starting in 2013 the survey was renamed to the "National Surveys on Energy and Environment" (NSEE). Although the datasets are listed by survey wave, the NSEE is a valuable source of longitudinal public-opinion data on climate change and energy policy. Many questions have been asked over multiple waves, including questions about belief in global warming that have been asked in every wave of the NSEE. Also check Open ICPSR for additional rounds.
