2012 metastudy in the journal Nature on the differences in crop yields between organic farming and conventional industrialized agriculture.

2012 report from the Congressional Research Service on U.S. energy production and consumption, with breakdowns of production and consumption by sector.

2011 study in Review of World Economics analyzing the case of Ghana to see how countries might avoid the so-called resource curse.

2012 study in the Proceedings of the National Academy of Sciences on the total amount of water utilized by individuals and societies globally.

2011 United Nations report on the ecological and economic impacts of electrical and electronics equipment recycling and disposal practices in West Africa.

2009 study by Harvard University and Finland’s VTT Technical Research Centre on the overall global potential for wind-generated power.

2012 study by New York University and Yale University on possible peer-influence effects in the installion of solar panels within different ZIP codes.

2009 study by the Lawrence Berkeley National Laboratory on the potential benefits of increasing the reflectivity of urban surfaces such as pavement and roofs.

2011 study by Columbia University’s Earth Engineering Center on the energy contained in discarded plastics and its economic value.

Study by researchers at Towson University and the Smithsonian Conservation Biology Institute on survival rates and causes of death of gray catbirds.