You winded up the seminar by summarizing the importance of water in our life. You suggested rain water harvesting techniques to be used and implemented in your society. Rainwater harvesting refers to -
Conserving rainwater by using rooftop or underground tanks.
There are many ways to save water, the most prominent being rainwater harvesting. In this the rainwater is conserved by either installing rooftop tanks or underground reservoirs. The rain water collected by the roof of a building can be stored and can be used in the future.