Passage: 'Solar panels convert sunlight directly into electricity using materials called semiconductors. When sunlight strikes the panel, it knocks electrons loose, creating a flow of current. Because sunlight is free and does not produce greenhouse gases during operation, solar energy is considered a clean source of power. One limitation is that panels produce less electricity on cloudy days and none at night, so many systems include batteries to store extra energy.' What is the main idea of the passage?
Answer and explanation
Correct answer: A. Solar panels turn sunlight into clean electricity but have limits
The passage explains how panels work and their limits.
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