Okay kiddo, let me explain it to you in a way you can easily understand.
This year, 2017, has been declared by the United Nations as the "International Year of Sustainable Tourism for Development". So, what is sustainable tourism?
Well, when people go on vacation or travel somewhere for fun, they need somewhere to stay, food to eat, and things to do. Sustainable tourism means doing these things in a way that doesn't hurt the environment or the local communities you're visiting.
For example, if you go to a beautiful island, you don't want to stay in a giant hotel that's built right on the beach because it could damage the ocean and the animals that live there. Instead, you might stay in a more eco-friendly hotel further away from the beach, or even in a local home to help support the community.
Sustainable tourism also means being respectful of the local people and their way of life. If you visit another country, you want to learn about their culture, history, and traditions. You shouldn't just do things that are fun for you without thinking about how it affects the local people.
So, the International Year of Sustainable Tourism for Development is all about encouraging people to travel in a way that helps the environment and supports local communities. By doing this, we can enjoy traveling and vacations while also helping to make the world a better place!