Balaji Institute of Technology & Sciences uses Solar Panels for generating electricity which will not pollute the environment. Lots of small solar cells spread over a large area in the campus are providing enough power. The more light that hits a cell, the more electricity it produces, so spacecraft are usually designed with solar panels that can always be pointed at the Sun even as the rest of the body of the spacecraft moves around, much as a tank turret can be aimed independently of where the tank is going.