It is a wonderful binding and strengthening building material, and was once widely used across the country. Its climatic responsiveness and advantage, right from embodied energy to heat transfer and longevity, in tropical India are experienced both by laypersons and technical experts. But it has failed to compete with its vicious competitor—cement. The fact is that the cement industry gets tremendous support from the government, right from procuring raw material, to sourcing energy, water and land. As a result, the highly subsidised readily usable cement bag is easily available to a consumer compared to lime, which is difficult to source. This has prompted builders to opt for cement over lime for basic construction. The use of lime over cement in various components, such as lime-mortar, lime-plaster and screed, would propel a building towards being green.