Rainwater harvesting

DEFINITION: The collection and storage of roof rainwater for on-site reuse. The water makes its way through rainwater systems and fine mesh filters, into a tank, usually underground, and then is pumped from that tank to be used in a number of non-potable applications. This can reduce the demand on the potable water supply provided by the water companies significantly and reduce water costs.

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The City Law School, which is set to open in early 2019, has several built-in sustainability features including a car-free zone, secure cycle parking and tree planting

London law school set to reap rewards from rainwater harvesting

City, University of London is set to install a rainwater harvesting system at its new £42m law school, in a move which could reduce its water costs by more than £4,500 each year.