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Depletion of Ozone Layer:
Since the last decade or so, there is concern about the possible reduction in the ozone layer surrounding the earth. Now the question arises, what had led to the depletion of this layer. The reasons are many. The foremost is the widespread usage of chlorofluorocarbons. These are gases which readily liquify when compressed. This makes them useful as refrigerants, propellants in aerosol cans, and in plastic foams. Chlorofluorocarbons are very stable and accumulate in the atmosphere, where they react with ozone. Nitrogen oxides also play a significant role in ozone destruction. It is being felt that the introduction of more nitrogen oxides into the upper atmosphere by jet planes flying there could decrease the ozone to dangerously low level. The fear is that chlorofluorocarbons will deplete the ozone layer and allow more ultraviolet radiations to reach the earth's surface. An increased level of ultraviolet radiations would cause more skin cancer, affect crops, interfere with oxygen cycle and even distoti weather patterns.
laboratory apparatus for separating mixture
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How to make a simple apparatus for distilling water You can make a easy water-distilling apparatus from a flask, and a length of glass or rubber tubing. Fit the flask with a si
Astronomy and Physical Sciences: Astronomy was used not only for working out the calendar, the dates of the eclipses and for the determination of time but also for casting h
What are the Factors Affecting Soil Formation Parent materials formed due to weathering of rocks are transported from the place of their origin and re-deposited before they ar
Everything on electrolysis
what is the valproic acid toxicity?
Fission, and fusion energy: 'The Italian navigator has arrived in the new world' This coded message announced the beginning of the atoyic age on 2nd December? 1942. The 'n
Food allergies: Food allergies are different from food fads. Certain fds seem to have strange reactions on some people. Probably, you have come across a person who got skin ra
Are these people a worker in a farm? Which is the Independent and Dependent variable and Control group.
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