The amount of Earth covered by water might imply that all water is a renewable resource. Which statement best explains why not all water is renewable?

A. Most water on Earth is salt water, and salt water is not a renewable resource.
B. Only 1 percent of water on Earth is drinkable, which makes this water limited.
C. Fresh water is evenly distributed around the world.
D. About one-third of all freshwater is frozen in the polar ice caps.

What conclusion can be drawn from the information in the chart? a) africa's total number of hiv/aids cases makes up close to 20% of the world's total aids cases. b) poverty and lack of education are the only factors that have pushed the african aids rate to 6.1%. eliminate c) a major challenge facing african governments is finding a way to effectively combat the aids epidemic. d) north american aids rates are lower than the worldwide rate because of extensive government intervention and spending.

Which of the following is an advantage of using nuclear power plants to produce electricity?

Define production possibility curve