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There can be no greater example of a mankind's creative genius than for him to create new abodes of life throughout the solar system. Today, with an increasing population of more than six billion people and the fear of possible disaster, the need for an alternate home for mankind has become urgent. Mars is the only planet in our solar system, besides Earth – that has all the ingredients necessary to support life. Though the average surface temperature on Mars is frigid and it is a desolate lifeless planet, Mars once had an atmosphere thick and warm enough to allow for the flow of liquid on its surface.

If it is ever done, transforming a dry, desert-like Mars into a lush environment that can support the flora and fauna of the Earth, will be a mammoth task requiring decades or maybe centuries! Two methods have been proposed to make this a reality. One is placing large orbital mirrors that will reflect sunlight and heat onto the polar caps of Mars, which would melt the ice there. Gradually, the rise in temperature would release the greenhouse gases and heat the planet.

Another option would be to set-up solar-powered, greenhouse gas producing factories. Imitating the process of photosynthesis, the atmosphere of Mars would be oxygenated to the extent that people would survive on Mars with only a breathing apparatus.

While we may reach Mars this century, it would take several millennia for transforming it into a planet wherein plants and animals can flourish.

Choose the most appropriate option to complete the following:

The purpose of using orbital mirrors on Mars would be to -

Solution

✅ Correct Option: 2

According to the passage, the mirrors would reflect sunlight and heat onto the polar caps, melting the ice; the resulting rise in temperature would release greenhouse gases and heat the planet as part of making it habitable. Thus the purpose is to modify the temperature and release greenhouse gases to sustain life, not merely to brighten the planet, generate water, or keep it cold.

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