Rank #23
Use a rain barrel to collect rainwater.
This description explains how to use a rain barrel to collect rainwater. Rain barrels are a great way to conserve water and save money on your water bill. They are easy to install and can be used to collect rainwater from your roof or other sources. With a rain barrel, you can
From Wikipedia
A rainwater tank is a water tank used to collect and store rainwater runoff, typically from rooftops via pipes. Rainwater tanks are devices for collecting and storing harvested rain. A rainwater catchment or collection system can yield 1,000 litres (260 US gal) of water from 1 cm (0.4 in) of rain on a 100 m2 (1,100 sq ft) roof.