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.
Changes in Earth's atmospheric carbon dioxide levels over geological time.
Exponential population growth.
Prostate cancer. In this example, a large mass has grown into the urinary bladder. Prostate cancer i
Earth’s Heat Budget
Earth Atmosphere
Earth’s Climate System