The U.S. Bureau of Labor Statistics released the results of its Green Technologies and Practices Survey at the end of June 2012. The most frequently reported types of green technologies and practices were related to improving energy efficiency within the establishment (57%), and waste reduction as a result of operations (55%). About 854,700 jobs, representing 0.7 % of total U.S. employment, were held by workers who spent more than half of their time involved in green technologies and practices during the survey reference period of August 2011.
Green Technologies and Practices Summary is available at:
http://www.bls.gov/news.release/gtp.nr0.htm , with links to technical documents.