Answer:
Sustainability is when we can meet the needs of the current generation while making sure the needs of future generations can also be met.
Step-by-step explanation:
This is a well-know definition in economics and management, although it can be applied to practically any other field. When we take sustainability into consideration, we are basically keeping an eye in the future instead of simply focusing in the present.
We are now suffering the consequences of what past generations did. They were not concerned with deforestation rates or pollution, for instance, only worrying about meeting their own needs. However, we are learning from their mistakes. When we produce, we think of a way to do it without depleting future generations. In other words, we are meeting our needs while making sure they will also be able to meet theirs.