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Tboy:2 years ago
What do you understand by depletion of the ozone layer,and what are the causes and effects it has in the atmosphereAnswer This Question
2 years ago
Depletion of the ozone layer means a steady decline of about 4% per decade of volume of ozone in Earth's stratosphere and much larger springtime decrease in stratospheric ozone. In the atmosphere it affects the temperature. Learn more in 

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Types of water pollution There are many types of water pollution because water comes from many sources. Here are a few types of water pollution: 1. Nutrients Pollution Some wastewater, fertilizers and sewage contain high levels of nutrients. If they end up in water bodies, they encourage algae and weed growth in the water. This will make the water undrinkable, and even clog filters. Too much algae will also use up all the oxygen in the water, and other water organisms in the water will die out of oxygen from starvation. 2. Surface water pollution Surface water includes natural water found on the earth's surface, like rivers, lakes, lagoons and oceans. Hazardous substances coming into contact with this surface water, dissolving or mixing physically with the water can be called surface water pollution. 3. Oxygen Depleting Water bodies have micro-organisms. These include aerobic and anaerobic organisms. When to much biodegradable matter (things that easily decay) end up in wat...
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