This is actually a good question as nobody talks and thinks about such a serious topic. As we know, resources are limited, and they will exhaust themselves in the future if we don’t utilize them in a proper way.

Basically, the main motto of sustainable development is to meet the basic need of today’s human beings without compromising the needs of our future generations. It simply means that we should conserve our resources and use them in such a manner so that our future generation could also take benefit from them. It protects our world’s resources whereas it’s true goal is to control the resources.

Sustainable development is important today because within 20 years the population of the Earth will start pressurizing resources to a great extent. The shortage of resources will result in a lot of problemshence, sustainable development is extremely important to manage the growing needs of the human population.

Sustainable development is the pathway to the future we want for all. It offers a framework to generate economic growth, achieve social justice, exercise environmental stewardship and strengthen governance.
- Ban Ki-Moon

This quote from Ban Ki-Moon pretty much sums up the importance of sustainable development in today's era. Sustainable development is defined as developing the world around us in such a way that it doesn't harm the future generations needs. We borrow this world from our descendants and they should have it as good as we can make it for them. Sustainable development will ensure that we don't overuse the Earth's resources and harm development processes in the future.