What can people do to conserve earth’s local coal supply?
a- invest in solar power plants
b- install scrubbers to power plants
c- capture and store carbon
d- replant diminishing forests.

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water