The glass panel used in greenhouses is known to retain .
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A.
pH
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B.
humidity
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C.
rainfall
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D.
heat
Correct Answer:
D. heat
Explanation:
The glass used in greenhouses is designed to be transparent to short-wave solar radiation, allowing sunlight to enter and heat the interior surfaces like soil and plants. Once absorbed, this energy is re-radiated as long-wave infrared radiation (heat). Because glass is effectively opaque to these longer wavelengths, it prevents the heat from escaping back into the atmosphere, creating a warming effect known as the greenhouse effect. Additionally, the physical structure of the greenhouse suppresses convection by trapping the heated air inside.
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