The production process of AAC Blocks uses fly ash which is a by-product in thermal power plants. Conventional bricks need fertile top soil. Therefore use of AAC Blocks as an alternative to red bricks prevents needless erosion of fertile top soil. Also, the production process of AAC Blocks is very energy-efficient and emits very less CO2. AAC Blocks used in construction of 15 sqft of carpet area uses 0.9677 kg of coal. AAC Blocks are recyclable. Usage of AAC Blocks significantly reduces electrical expenses due to reduced HVAC (Heating, Ventilation and Air-Conditioning) load, qualifying it to be a “Green” building material.