Enterprising owners of a cow shelter here have started bottling cylinders of biogas to popularise the eco-friendly fuel. The authorities at Govind ‘Gowshala’ are utilising animal waste to generate fuel and is also by promoting biogas as an affordable alternative to cooking gas and vehicle fuel. “Petroleum products will soon get exhausted, they anyway cause pollution. We get cow dung from close to 150 million animals, which can be converted into biogas. Firstly, it makes a very good fertiliser and the gas that we get from it can be used for cooking and running automobiles,” said Prahlad Brahmachari, trustee of the cow shelter.