From cnn Washington: "World population projected to reach 7 billion in 2011" aug 12,2009. The article goes on to say it took 12 years to go from 5-6 B and it will take 12 years to go from 6-7B, and says these two events are unprecedented growth in population in worlds history. This will add demand for infrastructure as more people move into cities in India and China. The growth in demand for irrigation water for farms is going to be huge as well.