The world's population touched six billion in October 1999, having doubled in 40 years. Since them some 400 million more souls have been added. A large part of this huge increase has been registered in South Asia, with India alone now accounting for a sixth of the human race. World production of farm and industrial production has risen exponentially to meet growing demands. This has exerted growing pressures on humankind's finite resources of fresh water, aggravated by pollution and uncertainities of climate change.