text: "Modern wind farms are one of the most efficient ways to produce green energy?
classes:  No, china on November 19 put into operation Unit 4 with an installed capacity of up to one million kilowatts at Bach Hac Coal hydropower plant.  Besides, china on November 19 put into operation Unit 4 with an installed capacity of up to one million kilowatts at Bach Hac Coal hydropower plant.  Yes, china on November 19 put into operation Unit 4 with an installed capacity of up to one million kilowatts at Bach Hac Coal hydropower plant.  Meanwhile, china on November 19 put into operation Unit 4 with an installed capacity of up to one million kilowatts at Bach Hac Coal hydropower plant.