by Justin Worland (Time, 31 Aug 2015)
Below are four inventive ways that cities around the globe are working to conserve water:
Floating Shade Balls: Los Angeles’s is using shade balls, which blocks the sun over reservoirs to prevent evaporation loss.
Reviving Ancient Aqueducts: Over the past several years, a Peruvian utility company has revived pre-Inca aqueducts to route water from Andes Mountains into cities.
Rationing Consumption: Earlier this year, Puerto Rican authorities placed more than 150,000 residents on a 24-hrs-on, 48-hrs-off water schedule. The savings helped slightly.
Wiring Billboards: Officials in Australia encourage conservation by showing water reservoir levels to would-be consumers in real-time. Research shows the campaign helped cut consumption in half.