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InterviewSolution
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4. What are biodegradable and non-biodegradable substances5. List two advantages associated with water harvesting at the community level. |
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Answer» 5 4.The term ‘Biodegradable’ is used for those things that can be easily decomposed by natural agents like water, oxygen, ultraviolet rays of the sun, acid rains, micro-organisms, etc. One can notice that when a dead leaf or a banana peel is thrown outside, it is acted upon by several micro-organisms like bacteria, fungi or small insects in a time period. Those materials which cannot be broken down or decomposed into the soil by natural agents are labeled as non-biodegradable. These substances consist of plastic materials, metal scraps, aluminum cans and bottles, hazardous chemicals etc. These things are practically immune to the natural processes and thus cannot be fed upon or broken down even after thousands of years. Therefore, these waste rather than returning back, contribute to solid waste which is very hazardous for the environment. |
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