Why did virtually all countries in the world agree to ban the use of CFCs by 2020 for developed countries and by 2030 for developing countries?
A) to prevent acid rain
B) to reduce global warming
C) because there are cheaper coolants that work better
D) because of overwhelming evidence that they destroy the ozone layer
E) because of overwhelming evidence that they cause smog in cities
Question 2
A gas threatening Earth's ozone layer is
A) sulfur dioxides.
B) chlorofluorocarbons .
C) the greenhouse effect.
D) photochemical smog.
E) nitrous oxide.
Location of major biodiversity hot spots around the world.
Cesarean Section Rates, Selected Countries
World War II Pacific Theater
How Much Food Does the World Produce Per Person?
Descending limbs of Hadley cells are the sites of the world’s major deserts
Countries where malaria is prevalent today are located in the warm tropics and subtropics