ENVS CHAP 14

Question 1

What is a demographic transition?

Answer 1

It is the switch form high birth and death rates to low birth and death rates.

ex. after baby boomers

Question 2

Why has a demographic transition from high to low occurred?

Answer 2

B/c medical advances reduce death rates while personal choices reduce birth rate (voluntary). Important with the assumption of a global carrying capacity

Question 3

What are emerging infectious diseases?

Answer 3

They are diseases appearing in the human population for the first time or expanding rapidly in incidence or geographic range (must faster than environmental change).

ex. HIV, ebola, SARS, lyme disease

Question 4

What are most emerging infectious diseases classified as?

Answer 4

Most are zoonoses, meaning they are infections that circulate naturally in non-human vertebrate hosts, but they can be transmitted to humans