Define a biodigester?
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What is Ecology?
Under which form is nitrogen fixed by the living beings.
Why are less biodiverse ecosystems under the risk of suffering deep biological harms if submitted to even small changes?
What are the processes that autotrophic beings use to produce organic material from inorganic substances?
What are the main characteristics of the age pyramids of developed countries?
Why is the sun the “motor” of the water cycle?
Define dry mass?
What do you mean by eutrophication?
Define predatism?
Define species?
What are tropic levels?
Explain the role of the ozone layer for the living beings?