Reduce, Reuse & Recycle. Even though you are just exploring and not paying utility bills, disposing of your garbage properly and minimizing the consumption of water and energy will benefit the overall destination.
One of the biggest gifts you can have from this program and that makes this program special is the access to rich local cultures and centuries old monasteries. There is so much to learnand model from them. These are one of the friendliest people on this planet.
Avoid buying water bottles every time you run out of water. Instead refill it. This has a huge impact on environment
Be sensory acute to local culture and respect them.