It is well known that golf is not the most sustainable sport, it uses a lot of resources to create greenery and beautiful landscapes. This doesn't mean you can't lean toward more eco-friendly ways to play. In my Pacific Northwest home region, where rainfall is abundant, we have many courses that target sustainable ways to maintain their beauty.
This is not always possible, especially in desert climates, but if you are interested in geo-certified courses, This site can help guide you Towards the best options in your field around the world. You'll find plenty of other resources elsewhere online to help, and it's always good to feel good about where you play in more ways than one.