President Shirley M. Tilghman on energy and the environment Share on Facebook(Link is external) Share on Twitter(Link is external) Share on LinkedIn(Link is external) Email Print By Evelyn Tu on July 1, 2008, 2 a.m. President Shirley M. Tilghman on energy and the environmentVimeo keyboard shortcuts(Link is external)(Link is external)Play video:(Link is external) President Shirley M. Tilghman comments on Princeton’s focus on energy and the environment.