In southern India, a carbon capture plant at the industrial port of Tuticorin has figured out how to successfully use CO2 emissions to make baking soda. Unlike carbon capture and storage, in which emissions are forced into underground rocks at great cost and no economic benefit, the Tuticorin plant is said to be the first economically viable industrial scale example of carbon capture. The firm behind the process says its chemical will lock up 60,000 tons of CO2 a year and the technology is attracting interest from around the world.