Aditya Birla group firm UltraTech Cement plans to increase usage of green energy by nearly four times from the current levels by 2030, to meet all its electricity requirements through renewable sources by 2050. The company, which has the capacity to produce nearly 140 million tonnes of cement each year, is expanding its waste heat recovery systems (WHRS) apart from switching to renewable energy sources. It currently has 691 MW of green energy capacity, which includes 262 MW of WHRS installed capacity and 429 MW of contracted renewable energy.Contact: UltraTech CementTel: 022-66917800Website: www.ultratechcement.com