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Question

The greenhouse effect is warming due to ___

A
Infrared rays reaching Earth
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B
Moisture layer in the atmosphere
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C
Increase in temperature due to increase in carbon dioxide concentration of the atmosphere
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D
Ozone layer of the atmosphere
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Solution

The correct option is (C) an increase in temperature due to an increase in carbon dioxide concentration in the atmosphere

Greenhouse effect

The greenhouse effect is the phenomenon of heating the Earth’s surface due to the absorption of heat, radiated back by the heated Earth’s surface, by thegreenhouse gases, such as CO2, followed by their emission towards the Earth’s surface, thus, avoiding their escape into space.

Infrared rays reaching Earth

Infrared radiation is the part of the sunlight spectrum that causes the Earth’s surface heating. The heating by the infrared rays does not lead to a greenhouse effect.

Moisture layer in the atmosphere

The moisture layer in the atmosphere contains water molecules. It does not cause heating of the Earth's surface and, therefore, does not lead to a greenhouse effect.

The ozone layer of the atmosphere

The ozone layer is a layer in the stratosphere consisting of ozone molecules. Its main role is to act as a shield and prevent the harmful UV radiations of the Sun from reaching the Earth's surface. It does not lead to a greenhouse effect.

Final answer (C) Increase in temperature due to increased carbon dioxide concentration in the atmosphere.

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