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| Summary |
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- Environment is defined as the surroundings in which the organism lives. It has two components - abiotic and biotic.
- The abiotic environment includes the air (atmosphere), water (hydrosphere) and land (lithosphere). The biotic environment includes the plants, animals and the microbes.
- The things that man requires for his survival and comfort are called the resources. So, the environment, with respect to man, is a reservoir of his resources.
- The wastes can be classified into:
Biodegradable: The biodegradable wastes are those that can be decomposed. For example, kitchen garbage, animal dung, etc.
Non-biodegradable: The non-biodegradable wastes are those that cannot be decomposed and remain as such in the environment. For example, plastics, nuclear wastes, glass, etc.
- Some of these wastes are also classified as hazardous wastes. Hazardous wastes are those that catch fire easily, react explosively with air or water, corrode other materials, are toxic or radioactive.
- Waste management involves collection, storage, transportation,
recycling and disposal
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