Care and proper management of the world's biomes are necessary to maintain sustainability. However, some ecosystems are in better condition than others. Which one of the following regions appears to be healthiest and best managed today?
A) Tropical forests in South America
B) Forests in the United States
C) Coral reefs throughout the world
D) Mangroves in southeast Asia
Question 2
Inhaling fine particulates from smoking or from industrial sources is most likely to
A) cause nasal irritation and sneezing.
B) result in their being trapped in and damaging lung alveoli.
C) result in their passing into the blood stream and damaging the heart and brain.
D) cause an increase in blood levels of carbon dioxide.
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