18. a. Thermal insulation: recycled materials (75-80% from
recycled glass bottles) are used as replacement for
natural sand.
b. Tiles: recycled materials (7-12% from soils, ceramic
scraps) are used as replacement for natural soil.
c. Sanitary ware: recycled materials (14-19% from soils,
ceramic scraps) are used as replacement for natural
soil.
d. Faucet: recycled materials (27-32% from brass
scraps, copper scraps) are used as replacement for
natural materials.