A green gallery is a special kind of art exhibition that focuses on showing artwork that is all about the environment and nature.
For example, you might see paintings, photographs, or sculptures of animals, trees, and landscapes.
The reason it's called a "green" gallery is that it's all about promoting a love of nature and encouraging people to take care of the environment.
So, when you visit a green gallery, you're not just seeing beautiful artwork, you're also learning more about the natural world and how we can work to protect it.