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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.
Some Features of the Forests: Forests are the most widespread stretches of vegetation, harbouring diverse kinds of life forms. They are dominated by trees. Besides trees, f
Explain Betice Jones Protein - abnormal constituent of urine Betice-Jones Protein: Bence-Jones proteins are the small proteins (dimers of iminunoglobuljn light chains) normally
Life of a Star: A young star is thought to be composed largely of hydrogen gas. Hence, the most likely place for a star to be born is in one of the numerous clouds of hydrog
Which are clouds formed at the highest altitude: cirrocumulus
For chemically reactive wastes : The chemical property of the waste could be used in its removal in a number of ways as given below: i) Some water-reactive waste could be dispo
Explain Relationship of Vitamins and Mineral with physiology They play a major role in the body's functioning. Vitamin A is necessary for night vision in the eyes. Vitamin B co
what are 5 different types of asexual reproduction?
Explain Physiology of Gastrointestinal System In this unit we shall focus on the gastrointestinal system. The gastrointestinal system, you would realize, is also referred to as
Air pollution by Carbon monoxide: Carbon monoxide is produced when organic materials such as gasoline, coal, charcoal, and trash are incompletely burnt. Virtually all stoves,
The Assignment (1–2 pages): Complete the following: For context, provide a brief description (less than 100 words) of your media example (e.g., My media example is an adverti
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