Question

_____ has required the use of solar water heaters since 1957

Answer 1

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Sorry I don't know the answer.

Answer 2

Answer:

Fuel crisis has required the use of solar water heaters since 1957

Explanation:

Israel brought the uses of solar water heater due to the crisis of Fuel. They started using solar water heater even before getting their independence. It has become widely used for the domestic purpose and around fifty-thousand solar water heater was sold in 1967 (that is within 10 years of its inception).

It has started spreading wider and wider and that they could feel the difference in the electrical and solar rate. So Israel is the global leader and initiator of the solar industry.