Solar water heaters would be immesely ______ since it would help dramatically lower our energy costs.
举一反三
- Solar water heaters help to lower energy cost and cut carbon emissions.
- The solar water heater would become immensely popular if their prices dropped down, because they would help 1 lower 2 and at the same time cut 3 .
- Why does the author say solar water heaters would become immensely popular if their prices dropped down?
- Currently there are ______ rooftop solar water heaters in China.
- Our population is dramatically growing toward 13 billion people and our demand for food, fresh water and energy is predicted to double.