What are the main chemical compounds that destroy the ozone layer?
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What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution?
Define parasitism?
What are the typical vegetation and the typical fauna of the tundras?
Define biosphere?
What is population density?
What are biomass pyramids?
Define a biome?
What is the respective importance of carbon for the living beings?
Define inharmonious ecological interaction?
Does thermal inversion occur in the winter or in the summer?
What is the carbon cycle?
How can the abundance and diversity of living beings in the tropical forests be explained?