Which statement about passive solar heating systems is true? a they do not work in enclosed areas b they generate electricity c their heat cannot be stored d they do not produce electricity

D. They do not produce electricity.

Passive solar heating is a technique where the sun's energy is used for heating spaces. It does not generate electricity but can save substantial electricity by making use of thermal mass. Materials that have a high density such as concrete and bricks absorb and store electricity. Along with operable windows and thermal chimneys,  thermal mass is being utilized to take advantage of sun exposure.

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