Maha Shivaratri Celebration-Monday, March 7, 2016 Maha Rudra ...
Maha bio
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Transcript of Maha bio
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OUR ENVIRONMENT
&
MANAGEMENT OF NATURAL RESOUCES
Maha.
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i) Biodegradable wastes :- are wastes which are decomposed into harmless substances by microorganisms. Eg :- vegetables, fruits, pulses, cereals, cotton, jute, wool, wood, leather, paper, animal dung, animal bones etc.ii) Non biodegradable wastes :- are wastes which are not decomposed by microorganisms. Eg :- polythene bags, plastics, synthetic fibres, glass, metals, synthetic rubber, insecticides, pesticides etc.
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Ecosystem :- An ecosystem consists of all the living organisms in an area along with the non living components and their interaction. There are different types of ecosystems. They are :- i) Natural ecosystems :- like forests, deserts, grass lands, mountains, ponds, lakes, rivers, oceans etc. ii) Artificial ecosystems :- like gardens, parks, crop fields, aquarium, zoo etc.
Components of an ecosystem :- An ecosystem consists of two main components. They are biotic and abiotic components. i) Biotic components :- are the living components like plants, animals and microorganisms. They consist of producers, consumers and decomposers. Producers :- are green plants which produce food by photosynthesis. Consumers :- are herbivores which get their food directly from plants, carnivores which get their food indirectly from plants and omnivores which get their food directly or indirectly from plants. Decomposers :- are microorganisms which decompose dead plants and animals. They decompose complex organic substances into simple inorganic substances in the soil which are again used by plants.ii) Abiotic components :- are the non living components like air, water, soil, minerals, sunlight , temperature, wind etc.
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FOOD CHAIN:-
A food chain is the flow of food energy from one organism to the next and to the next and so on. They usually start with a producer (plants) and end with a carnivore. In a food chain an organism gets food from one group of organisms.
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FOOD WEB:-Food web is a group of several interconnected food chains. In a food web an organism gets food from more than one group of organisms.
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Human activities affect the environment :-
Depletion of ozone layer in the atmosphereManaging garbage we produceSeawage treatment
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Land fills Recycling
Production of biogas and manure Preparation of compost
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Sewage treatment
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Natural resources:- Natural resources are the resources available in a nature like air, water, sunlight, soil, minerals, forests, wild life etc. Natural resources are of two main types. They are renewable and non renewable natural resources. i) Renewable natural resources :- Are the resources which can be replenished in a short period of time like air, water, sunlight, forests etc. ii) Non renewable natural resources :- Are the resources which cannot be replenished in a short period of time like minerals (coal, petroleum, natural gas, metals etc.) because they take millions of years to be formed. Human activities produce a lot of waste materials which are thrown away into the environment. These wastes cause pollution of natural resources like air, water and soil.
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NATURAL RESOURCES
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The Three R’s to save the environment
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WE ARE GOING TO KNOW ABOUT:NEED FOR MANAGEMENTING NATURAL RESOURCESIMPORTANCE OF FORESTS CONSERVATION OF FORESTSUSES OF WATERADVATAGES &DISADVANTAGES OF DAMSIMPORTANCE OF WILDLIFECONSERVATION OF WILDLIFECOAL AND PETROLEUMACID RAIN FORMATION
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