Water and energy are inseparable friends.Water and energy are natural partners. Water is required to generate energy. Energy is required to deliver water.
Today over 80% of power generation is by thermal electricity. Water is heated to create steam to drive electrical generators. Billions of gallons of water are also needed for cooling. This requires limiting construction and use of the least efficient coal-fired power plants. Worldwide hydropower accounts for 16% of global electricity production - an expected 3700 major dams may more than double the total electricity capacity of hydropower within the next two decades.
New energy production should use widely adopting dry-cooling or highly efficient closed-loop cooling technologies. Using alternative water sources, such as sea or wastewater, offers a great potential for reducing the pressures on freshwater resources.
Renewable energy comes from resources which are naturally replenished such as sunlight, wind, rain, tides, waves and geothermal heat. These do not require large quantities of fresh water.