(i) Sustainable development: Development which meets the current basic human needs, while preserving the resources for the needs of future generation. It is necessary for environmental conservation.
(ii) Water harvesting: It is a method to capture every trickle of water that falls on the land. Following are some benefits of water harvesting:
(a) Recharges wells/Ground water.
(b) Provides moisture for vegetation.
(c) It is not lost by evaporation.
(d) It does not provide a breeding place for mosquitoes.
(e) Prevents ground water from contamination due to human and animal wastes.
