In my opinion, what is earth art?

Earth art can be many things. Because of this, it feels hard to summarize. Taking a stab at in anyhow, I feel that earth art happens when people rearrange the environment around us for the sake of making a statement or to exercise their creativity. One of the purest ways to sculpt, I find it fascinating because it is sometimes may be understated or outstanding based on your perspective, and always respectful the land it occupies.