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.

Four types of motile cells in human body?

Which type of respiration takes place when there is no oxygen present

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.