Which of the following strategies can earth's coal supply last longer? a. replant diminishing forests. b. install scrubbers in power plants. c. build and use solar power plants. d. capture and store carbon.

C. Build and use solar power plants.

Coal is a non renewable source of energy, once consumed cannot be recovered. Therefore the quantity of coal is reduced with its continuous usage throughout in the world. On the other hand solar energy is a renewable source of energy and it has to do nothing with the quantity of consumption. So we can say that replacing non renewable sources of energy such as coal with renewable sources of energy that is solar energy can make the coal supply last longer.

C- build and use wind power plants