“We are responsible for what we are, and whatever we wish ourselves to be, we have the power to make ourselves. If what we are now has been the result of our own past actions, it certainly follows that whatever we wish to be in the future can be produced by our present actions; so we have to know how to act.”
For the first example we need to save energy because energy is running out and energy consumption contributes to air pollution such as global warming, melts polar ice and etc. We should decrease an energy using in every family. Close the air conditions when you leave off, cycling instead of car and recycling used bottles, paper, etc.