Ecovention was a term invented by Amy Lipton and Sue Spaid in 1999 to refer to an ecological art intervention in environmental degradation. The Ecovention movement in art is associated with land art, earthworks, and environmental art, and landscape architecture, but remains its own distinct category. Many ecoventions bear tendencies similar to public works projects such as sewage and waste-water treatment plants, public gardens, landfills, mines, and sustainable building projects.