Quote from kingfisher3210:
[BSimply it is a case of growing population multiplied by increasing standard of living. [/B]
The population growth decelerates significantly when living standards improve, it has happened everywhere.
These sorts of estimations on future are way too simplistic, there will be disasters (by human and non-human factors) which change the growth rates dramatically. I'm quite certain India will have a huge water crisis before 2030, it will impact the agriculture there greatly. The neighboring countries will supply water to India but it won't be cost efficient (with a pipeline cost) to use it in agriculture.
