Q. Tritium is a radioactive isotope of

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Q. CFCs are used in cleaners, working as a blowing agents in the

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Q. What is amount of heat input needed to change temperature of a substance?

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Q. Scientists predicted that at current rate of deforestation, world's rain forests will be vanished in

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Q. DU stands for

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Q. Since 1880s, earth's sea level has risen by

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Q. Deuterium is a heavy isotope of

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Q. Sonde is a device in atmosphere, obtaining information, such as temperature and

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Q. What does Ozone demage?

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Q. Ozone particles are scattered between 19 and 30 km up in the

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Q. In 1990, concentration of carbon dioxide is considered to be responsible for causing

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Q. Hot bodies emit more radiation than

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Q. Process involved in wind passing over blades, converted into

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Q. Lowest values of ozone, found under normal condition around the

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Q. During 1990 to 2000, 60% of deforestation occurred in

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Q. Short exposure to 'UV-B' radiations can cause the

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Q. In 1987, Montreal protocol was passed to reduce emissions of

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Q. Solar energy has greatest potential for providing clean and

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Q. Chlorofluorocarbons are non-toxic, non-flammable and

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Q. Ozone holes are first discovered in Antarctica in

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