Define biosphere?
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What is the most abundant form under which nitrogen is found in nature?
What do energy pyramids represent?
What is the typical vegetation of the tropical forests?
Define carbon cycle?
What are the main chemical compounds that destroy the ozone layer?
Define ecology?
Explain why transgenics are considered a threat to the environmental safety?
What is the group of aquatic beings composed of large number of photosynthetic beings?
Define bioremediation?
Explain how does biological diversity relate to the characteristics of the abiotic factors of an ecosystem?
Why does thermal inversion increases air pollution?
What is predatism?