Growing demand for energy will put increasing pressure on the world's already strained water resources, particularly in developing and emerging economies, the UN has warned. "There is an increasing potential for serious conflict between power generation, other water users and environmental considerations," it says in the world water development report, published on the eve of World Water Day...Energy production accounts for close to 15% of the world's water usage, but that figure could rise...Much of this is due to growing populations and economies in China, India and the Middle East...About 90% of power generation is water-intensive, says the report, which warns that less conventional oil and gas production, including via tar sands and fracking – along with biofuels – place particularly large demands...The report laments that the energy sector has "great political clout", whereas water, as an issue and an industry, often lacks influence...