1. KNP Arises While dining at a fine restaurant in Delhi, Kirti and her husband Sushil Vaishnav realised that most restaurants do not know the right way of disposing of used cooking oil (UCO).

To deal with the issue, they co-founded KNP Arises, which collects UCO and fats from restaurants and converts them into biodiesel. This generates 80% lower carbon emissions as compared to fossil fuels.

2. Green Joules In 2018, Viraraghavan Sankaran, Radhika Viraraghavan, Shridhar V S, and Sethunath Ramaswamy founded Green Joules to make sustainable biofuels and reduce carbon emissions from vehicles and generators.

They patented renewable biofuels or ‘drop-in fuels’ made from agricultural residue and renewable wastes from agro-processing industries. This fuel can be used for industrial and commercial purposes.

3. Sea6 Energy This company started as research for an academic competition by IIT Madras alumni Sowmya Balendiran along with Sri Sailaja Nori and Nelson Vadasseri. This later on laid the foundation of the startup Sea6 Energy.

After four years of research, the team devised a process to convert seaweed into biofuel. They also produce a bio-stimulant named AgroGain, a chemical-free product made from seaweed extracts that enhances agriculture production by up to 15%.

4. Paterson Energy Founded by husband-wife duo Vidya and Amarnath Maitreyan, the startup focuses on reducing the reckless disposal of and treatment of plastic, converting it into something sustainable.

After three years of its inception, the startup was able to develop an innovation that converts plastic waste into liquid fuel. The fuel is eco-friendly and cheaper, and can be used to fuel generators, industrial boilers, and furnaces, among others.

5. GFF Innovations Hailing from farming backgrounds in Chandigarh, Varinder Singh, Nitin Kumar Saluja, and Vilas Chhikara built a machine called ‘Moksh’ that helps farmers turn stubble into fuel.

With an attachable extension, the machine can be mounted on a tractor. It is designed to pick up stubble from the farms and turn it into powder, which can then be used as an alternative fuel for boilers and a binding solution for making bricks.