Sustainability: The ability to conserve, mantain and support all the things we need to survive so we can have it for a longer period of time.
The point of sustainability is that we should keep our enviorment healthy so we can live a longer life. To have a longer period we will need to save water, electricity, and tree's. If we dont save tree's we wont have air, and without air we can die. So basically without tree's we wont even have paper eathier.