Environmental Science
What is meant by ex-situ conservation?

Conservation of a species outside its natural habitat
Conservation of plants
Conservation of forest eco system
Conservation of a species by protecting its habitat along with all other species living there

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Environmental Science
Biogas is composed of

ethane, carbon dioxide, nitrogen and hydrogen
methane, carbon dioxide, nitrogen and sulphur
methane, carbon dioxide, nitrogen and hydrogen
carbon dioxide, nitrogen and hydrogen

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