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This site does as its title suggests--provides statistics in real time. It includes current data on population, food and hunger, technology, information, and other topics relevant to seven revolutions.

The "green revolution" dramatically boosted crop yields throughout the world, but it also bred overconfidence and complacency. Now, global food stocks are too low, and food prices are too high (partly as a result of use of food for biofuels). The article talks about declining rates of increase in agricultural productivity as a result of reductions in investment in agricultural research.