Among these figure water-harvesting technologies and drip irrigation, as well as technologies that recycle grey water in peri-urban agriculture.

UNESCO: World Water Assessment Programme (WWAP)

Eligible improvements (PDF) include not only energy-saving equipment such as insulation, lighting, and HVAC systems but onsite renewable energy (rooftop PV, wind turbines, and fuel cells) and water-saving upgrades such as low-flow plumbing fixtures and grey water systems.

FORBES: California Launches Nation's Largest Clean Energy PACE Program

Hopes of a free-flowing encounter were dimmed by the grey, rain-laden skies, that left pools of water on the pitch.

BBC: Dragons 6-12 Glasgow

The clarity of the images was astonishing - laying bare everything from the spindly grey-brown chimneys, rising at crooked angles, to the violent pitch-black jets of superheated water to the ghostly swarms of blind shrimp.

BBC: A deep sea mission of genuine exploration

Black vinyl floors polka-dotted with chewing gum are overlooked by walls part covered with grey-beige corrugated metal and finished with brickwork rendered filthy by the water from above.

BBC: What makes a terrible railway station?