The construction of three hydropower plants in China have reportedly begun.
State Grid Co is building the power stations, which can also store the energy to be used during periods of high demand.
They have a capacity of 3.6 million KW and the total investment is 21.7 billion yuan (£2.29 bn).
All the projects, located in central and east China, are scheduled to be in operation by 2021, the company said.
The power plants are expected to reduce China’s greenhouse gas emissions.
The company currently has 19 hydropower plants with another 12 planned or under construction in the country’s central and eastern areas.
China’s installed hydropower capacity surpassed 300 million KW by the end of 2014, making up around a quarter of the world’s total, according to experts.