What are persistent organic pollutants (POPs?
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What is a population?
What is dry mass?
Define ammensalim?
Explain global warming?
What is the zooplankton?
Why does thermal inversion increases air pollution?
What is a food chain?
Explain why transgenics are considered a threat to the environmental safety?
Explain how are the grasslands of north america and of south america respectively called?
What is numeric pyramid? What does it represent?
What is predatism?
What is biodiversity?