GreenMicrofinance has been advocating for "Triple Bottom Line Investments" since 2004. Today we see the importance of agriculture, biofuels, and clean energy as all having potential for "impact investing".
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The following article may be of interest.
The latest trend in financing boasts a double or triple bottom line: returns, plus a solution to social or environmental problems.
“Impact investing” is the new buzzword in social development, an unlikely marriage between old-fashioned philanthropy and venture capitalism. The investment model, which considers the social and environmental benefits of a business venture on equal terms with its capacity to deliver return on investment, is being hailed as a way to direct more capital to solving problems in impoverished and marginalized communities.