The United States, with under 5 percent of the world's population, accounts for _____ of the world's consumption of both oil and natural gas.
a. 10 percent c. 25 percent
b. 21 percent d. 50 percent
Question 2
At today's levels of consumption and production, most significant OPEC countries are expected to deplete their reserves by
a. 2025 c. 2075
b. 2050 d. 2099