Question

what is one way to make earths coal supply last longer?
a. replant diminishing forests.
b. capture and store carbon.
c. install scrubbers in power plants.
d. teach public energy conservation.

Explanation:

• Option A: Replanting forests mainly relates to ecological balance (like oxygen production, habitat provision) rather than directly affecting coal supply duration.
• Option B: Carbon capture and storage is more about reducing greenhouse gas emissions (from coal - burning, for example) rather than making the coal supply last longer.
• Option C: Installing scrubbers in power plants is to reduce pollutants (like sulfur dioxide) from coal combustion, not to extend the coal supply.
• Option D: If the public conserves energy, the demand for coal (as an energy source) will decrease. A lower rate of consumption will make the existing coal supply last longer.

Answer:

D. Teach public energy conservation.