As the earth's population has grown since the mid-1900s, the following has occurred:
a. the number of people living in urban areas has almost doubled.
b. the number of people living in urban areas has decreased by half.
c. the number of people living in urban areas has reached 69.
d. the number of people living in urban areas has stayed the same.
Question 2
What milestone is it estimated the Earth will reach in 2050?
a. it will have a population of 6 billion people.
b. it will have a population of 106 billion people.
c. it will have a population of 9.3 billion people.
d. it will have a population of 7 billion people.
Continuous variation in a natural population
The Sun as it appears from the surface of Earth before sunset.
Size comparison of Earth and Uranus
Fertility and Population Density, 1850
As China has embraced its version of capitalism, wealth has grown, as has consumption. Luxury goods ...
The Distribution of Water on Earth