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Why is damage to the ozone layer a cause for concern? What steps are being taken to limit this damage?

Ozone layer forms a protective cover over the earth by preventing the ultra violet rays entering the earth. If the UV rays strike the earth it will cause a great damage to all the living organisms posing serious effects like skin cancer. The CFC liberated from refrigerators, fire extinguisher, etc is now destroying the ozone layer.

Steps to limit the damage of ozone layer are:

1. Reduce the use of CFC.
2. Usage of alternate form of CFC.


If all the waste we generate is biodegradable, will this have no impact on the environment?

The use of biodegradable waste has a great impact on the environment. If all the waste generated is degraded then the soil in our environment will become less polluted and more fertile.


What are the problems caused by the non-biodegradable wastes that we generate?

The non-degradable wastes causes major problem in the ecosystem as it gets accumulated in the soil it prevents the water to seep through the soil. It forms a thick covering over the soil and does not allow the organisms present in the soil to thrive. It inhibits the leeching property of the soil and destroys the fertility of the soil.


What will happen if we kill all the organisms in one trophic level?

Energy flows from one trophic level to another.If all the organisms in one trophic level is killed then the flow of energy will be arrested. The organisms in one trophic level predates on the organisms, which is on the lower trophic level and becomes the prey for the organisms in the higher trophic level. If we kill all the organisms in one trophic level then their prey will increase in population and their predators will be deprived of food.


Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?

The impact of removing all the organisms in a trophic level will be different for different trophic levels. Removal of any organism in any trophic level will affect the ecosystem.


What is biological magnification? Will the levels of this magnification be different at different levels of the ecosystem?

The industrial wastes, the chemicals used as pesticides and fertilizers are washed into water. They contain toxic substances like cadmium, lead, copper etc, these materials are harmful for health. The plants along with the water and minerals absorb these materials, some of the materials are taken by the aquatic animals and plants. By this way it enters the food chain. When these materials reach the human body directly with contaminated food or indirectly by way of plants and other animals. The concentration of the toxic material increases at each trophic level in the ecosystem. This is called Bio magnification or biological concentration.

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