Acid rain is a rainfall having pH of
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Biosphere constitutes
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Which of the following serves as source of carbon to plants?
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Least porous soil is
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The developer of three fold classification of environmental education is
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Chemical conversion process are often employed for collection of
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Colourless, odourless and non-corrosive air pollutants are
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First National Park of India is
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Principles of Resources Recycling may be
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Maximum oxygen comes from
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The concept of environments is based upon
1. Globalisation
2. Environmental degradation
3. Dimensions of totality of the environment of these
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First link in any food chain is a green plant because
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Microoganisms that convert various nitrogenous compounds into ammonia is
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Conservation is
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In what sphere above the earth, the satellites like INSAT are stationed
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Which of the following element found mostly in earth's crust?
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The term sub-soil is used for horizon
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The percentage of fresh water form of water on the earth is
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Which of the following pairs is a nonrenewable resource?
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Annual carbon fixation by photosynthesis is
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