Which of the following activities can increase the average global temperature of Earth?

Burning of fossil fuels

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Planting of trees

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Increased number of glaciers

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Setting more factories

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Solution

The correct option is D Setting more factories
Factories and the burning of fossil fuels release carbon dioxide into the atmosphere.
Carbon dioxide is a greenhouse gas and therefore traps more heat, increasing the temperature. Snow and ice reflect heat back into space. So, more glaciers will reduce the temperature.
More trees will absorb more carbon dioxide for photosynthesis, reducing their concentration in the air. This will prevent rising temperatures.

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