India may build new coal-fired power plants because they generate the cheapest power, according to a draft electricity policy document, despite growing calls from environmentalists to deter the use of coal.

Coal¡¯s contribution to electricity generation in India fell for the second straight year in 2020, marking a departure from decades of growth in coal-fired power. Still, the fuel accounts for nearly three-quarters of India¡¯s annual power output.

Environmental activists have long rallied against India adding new coal-fired capacity. Solar and wind energy prices are falling to record lows, which would help the world¡¯s third-largest greenhouse gas emitter cut emissions.