energy is one of the most important things in our life. it's used for people activities. nevertheless, it's limited, so we should save it. first, we should use it more efficiently. turn off the light when we don't use it. second, use renewable energy sources. wind, sun are abundant, enough for us to use for billions years. finally, not only electricity, other kinds of energy such as water and fuel should be saved. to sum up, energy is not endless and we should reserve it for next generations.
xin 5s và ctlhn nhé thanks!!
@toyeucau20
