What are the main characteristics of the age pyramids of developed countries?
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What are the differences between the age pyramids of developed and under developed countries?
What are the typical vegetation and the typical fauna of the tundras?
What is the carbon cycle?
Explain why waste is considered one of the major environmental issues?
What are the destinations of the organic material fabricated by the producers?
Define population growth rate?
Explain remediation?
What is the typical localization of the tropical forests regarding latitude?
How are the grasslands of North America and of South America respectively called?
Why transgenics are considered a threat to the environmental safety?
Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Define ammensalim?