Question

please write it by your own.

Analysis Based [Short Answers; ANY 2 less than 100 words]
1. The foam produced by the used of detergents, is harmful to aquatic life. Explain Why?

2. What might life be like without the ozone layer?

3. What causes Air pollution? How can we reduce air pollution

4. What are the common purification techniques for Brackish or sea Water? In this region, which is the common technique employed and why

Answer 1

you asked ans any two, here is the 3 ans.

1.Detergents can have poisonous effects in all types of aquatic life if they are present in sufficient quantities, and this includes the biodegradable detergents

All detergents destroy the external mucus layers that protect the fish from bacteria and parasites; plus they can cause severe damage to the gills. Most fish will die when detergent concentrations approach 15 parts per million. Detergent concentrations as low as 5 ppm will kill fish eggs. Surfactant detergents are implicated in decreasing the breeding ability of aquatic organisms.

2.Without the ozone layer, the Ultra violet portion of the sun's rays will reach the earth's surface resulting in an increase in skin cancer,eye cataract and suppression of the immune system in humans and other species. Food crops sensible to UV rays could also be affected.

3. Air pollution is caused by

• excess of toxic gases released into air by industries
• excess of CO released into environment by motors
• excess of dust.