How to make Chennai a clean city?

To make our Chennai a clean city, strict laws must be enforced. Government should ensure that people are fined whenever they throw litter on the roads or make the place unclean. Most of the foreign countries have laws to keep the place clean. Here, even though there are laws none of them is enforced in a proper way. Proper enforcing of laws is necessary. Morevoer, we should also take sincere efforts to keep our city clean.