Dreaming of earth means you are heavily attached the ideals of saving and preserving nature from the byproducts of the human race. You value the earth as the giver of life, and will do all you can to leave it as you found it for future generations to enjoy.
Earth also acts as a foundation for many of your business ventures. It keeps you grounded with solid fundamentals that have proven to be successful.
Some people may interpret their dreaming of the earth as the ground or land on which you stand. Others may see it as a place that you have been to or wish to go to very soon. Some people may see it as a place that they need to get away from or leave behind while others might see it as something they need more of in their life.