What are the main chemical compounds that destroy the ozone layer?
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What is parasitism?
How are grasslands classified?
What is selective waste collection?
Define eutrophication?
What are the processes that autotrophic beings use to produce organic material from inorganic substances?
Define commensalism?
What is the formula of the net primary production (NPP)? How does NPP relate to the energy pyramids?
How does the vegetal stratification of an ecosystem influence the biological diversity?
What are colonies?
What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?
What is Ecology?
Why does thermal inversion increases air pollution? Which harms can thermal inversion cause to humans?