How permanent should land art be? do we have a duty to preserve land art, even though it is meant to be ephemeral?

Land art essay

Write 1 page double-spaced 12 point front .Do not put date tittle , or name of the teacher on the page.

How permanent should Land Art be? Do we have a duty to preserve Land Art, even though it is meant to be ephemeral( meaning it is not to last forever) use examples of Land art like Robert smithsonn spiral jetty, Christo and Jeanne-Claude, The Gates, Double negagtive Michael Heizer etc