I presume you mean "think". Of course you should think of the future generation because that would mean you are trying to protect the earth, society and resources for the future. If we adopt a selfish view and only think of our self, how would we be contributing to the future and its sustainence! As humans, we must adopt a forward-looking approach and think of others and not only of ourselves because resources are scarse as they are, and probably in a state of depetion. We have to protect the environment and the ozone layer, and learn how to be not greedy, and put the brakes on especially in regards to industry which lets out harmful gases that attacks our beautiful earth!