Under which form is nitrogen fixed by the living beings.
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Explain what is an example of intraspecific competition?
What do energy pyramids represent?
Define carbon cycle?
Explain the analyses provided by the study of human age pyramids?
What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?
Why plutonium reprocessing is a big environmental issue?
Define biosphere?
Define the nitrogen cycle?
What are the phytoplankton and the zooplankton?
Define nuclear pollution?
What are the typical vegetation and the typical fauna of the taigas?
Why waste is considered one of the major environmental issues?