MIT students develop a brick making technology that needs no heat!
However, it does need the refuse that comes out of paper mills. Given the large amount of carbon ash, biomass, garbage, and plastics etc. that are available, brick making should have been an easy business in India. All of these inputs are available sometimes at a low price and with sensible regulation could also be priced negatively (supplier pays the user to pick up). The over-dependence on topsoil-high-heat input bricks needs to be done away with. A few crores into R&D could go a long way in overhauling brick making.