Here is cool idea, it is simple and yet very effective! it is a device that is able to pluck water from the air to assist farmers with irrigation. The designer is Edward Linacre from Australia, where this is likely to be very welcome when it gets super hot and fails to rain. This idea has just won the won the 2011 James Dyson Award.
These are the details for the Airdrop Irrigation device;
The Airdrop irrigation concept is a response to poor agricultural conditions in periods of severe drought. Extensive research into droughts revealed an increase in soil evaporation and trans-evaporation (plant and soil) due to the increasing temperatures. Airdrop Irrigation works to provide a solution to this problem. Moisture is harvested out of the air to irrigate crops by an efficient system that produces large amounts of condensation. A turbine intake drives air underground through a network of piping that rapidly cools the air to the temperature of the soil where it reaches 100% humidity and produces water.