Coimbatore is the third largest city in Tamil Nadu with a population of more than 15 lakhs. There are more than 30,000 tiny small, medium and large industries and textile mills. It is also called manchestor of South India. The climate in coimbatore is comfortable round the year. The city is situated on the banks of river Noyyal. Coimbatore is also famous for the manufacture of motor pumps, and varied engineering goods. Coimbatore remains one of the most pollution free cities in India. The major industries includes textiles, textile machinery, automobile spares, motors, electronics, steel and aluminium foundaries.