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'Vaayu', a biogas system by Pune engineer Priyadarshan Sahasrabuddhe, addresses LPG supply issues by converting kitchen waste into methane gas. It requires about five kg of organic waste daily and produces up to 800 litres of gas, fulfilling over 70% of a household's cooking needs.

Since its 2019 launch, over 450 units have been installed in Pune and other cities. Users like Dr. Varsha Gadre report significant reliance on biogas, using LPG only as a backup. The system stabilizes in about four weeks, and Sahasrabuddhe aims to convert 200 tonnes of food waste into energy daily within five years.