By the year 2050, the world���s population is projected to be _______.
a. 3 billion
b. 5 billion
c. 7 billion
d. 9 billion user: which of the following needs must be met to achieve sustainability?
a. water
b. energy
c. environmental
d. all of the above
1. By the year 2050, the word's population is projected to be D) 9 million. 2. D) All of the above (water, energy, and environmental) needs must be met to achieve sustainability.
