Second annual prize for water sustainability entrepreneurship

Does turning off the tap save more energy than turning off the lights?

Imagine H20 has announced round two of its annual prize for water enterpreneurship . This year, the focus is on finding start-ups with technologies for efficient pumping and piping, the reduction of energy usage in water purification processes, and other applications that reduce the amount of energy that is needed in order to mov or treat water and wastewater. The organization will dole out $100,000 in prizes.

In picking the focus for this year's prize, Imagine H20 points to statistics from the U.S. Environmental Protection Agency that suggest that retrofitting even just one out of every 100 homes with water-efficient technology could save 100 million kilowatt hours of electricity every year, avoidance of roughly 80,000 tons of greenhouse gas emissions. In California, the organization says, an estimated 19 percent of all energy used goes to pumping, moving or treating water.

The bottom line for H20: turning off the tap may save even more energy than turning off the lights.

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