An environmentally friendly turbine that is powered only by the flow of water, but that can irrigate 5,000 hectares of land, could solve a pressing problem for small farmers in developing countries.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/farmers-use-force-flow
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/financial-times-london