23 junio 2015
Through a randomized controlled trial of more than 30,000 households in Michigan — where one-quarter of the households were encouraged to make residential energy efficiency investments and received assistance — economists find that the costs to deploy the efficiency upgrades were about double the energy savings.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/s61AdSc_ohw/150623161341.htm
