Problem:
Question 1: Define the characteristics that make some pesticides parrticularly dangerous pollutants.
Question 2: Describe what is meant by "the demographic transition" in a human population. Explain why it might be important, for future management of himan population growth, to discover wheter the demographic transition is an academic ideal or a process through which all human populations necessarily pass.
Question 3: Energy cannot be cycled and refused but matter can. Discuss this assertion and its significance for ecosystem functioning.
Question 4: Explain, with examples, how the loss or introduction of a single species can have conservation consequences throughout a while ecological community.
Provide a brief explanation for your answer.