Sustainable living describes a lifestyle[1] that attempts to reduce an individual's or society's use of the Earth's natural resources, and one's personal resources.[2] It is often called as "earth harmony living" or "net zero living". Its practitioners often attempt to reduce their carbon footprint by altering their methods of transportation, energy consumption, and/or diet.[3] Its proponents aim to conduct their lives in ways that are consistent with sustainability, naturally balanced, and respectful of humanity's symbiotic relationship with the Earth's natural ecology.[4] The practice and general philosophy of ecological living closely follows the overall principles of sustainable development.[5]