Q. The long UV-B radiations are important for vitamin D production of the skin.

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Q. In which season is the ozone found at its maximum level in the northern hemisphere?

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Q. When was the ozone hole discovered?

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Q. The ozone hole is a phenomenon that has occurred in:

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Q. Which of the following chemicals are responsible for the depletion of the stratospheric ozone layer?

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Q. What does EESC stand for in context of ozone depleting compounds?

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Q. The Montreal Protocol bans the production of which of the following chemical substances?

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Q. Greenhouse gases that are directly influenced by human activities are:

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Q. What does an increase in carbon dioxide in atmosphere contribute?

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Q. Nitrous oxide has contributed about

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Q. Atmospheric methane concentrations is:

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Q. Amount of water vopours in atmosphere does not change because of

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Q. What are fluorinated greenhouse gases?

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Q. Most important greenhouse gase is:

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Q. 'Methane' is main component of:

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Q. What contributes to chemical destruction of atmospheric ozone?

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Q. Where do we get mathane gas from?

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Q. Methane can be seen bubbling up from:

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Q. 'WEC' stands for:

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Q. Methane reacts with hydroxyl (OH):

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