Alot of rainwater falls to the ground and flows into rivers and streams where it is basically locked out of direct use for domestic purposes. We use an iron gutter which traps rainwater from the roof and drains it into a water tank. This drastically cuts the water bills. In other areas people construct water pans in the desert or in areas where water has high salinity. This gives them to access to clean water which saves cash which could have been used to buy mineral water and for desalinisation. What method of rainwater harvesting do you use?