For a period of one month, choose one day a week to give something back to the natural world around you. This may be something as simple as picking up garbage or as involved as planting a tree.
During this period of time, monitor what you dream about and keep an eye on the "gifts" that you may receive from the natural world. (These may be as simple as a cooling breeze when you're hot or something physical such as a feather or an attractive stone.
When this exercise draws to a close, think about the give and take relationship you have with the natural world. Do you notice a correspondence between what you give and what you receive?