for the permanent nature of large-scale installations whose fragility may be destroyed when re-locating the work. Sustainability and public art Public art faces a design challenge by its very nature: how best to activate the images in its surroundings. The concept of “sustainability” arises in response to the perceived environmental deficiencies of a city. Sustainable development, promoted by the United Nations since the 1980s, includes economical, social, and ecological aspects. A sustainable public art work would include plans for urban regeneration and disassembly. Sustainability has been widely adopted in many environmental planning and engineering projects. Sustainable art is a challenge to respond the needs of an opening space in public. In another public artwork titled "Mission leopard" was commissioned in 2016 in Haryana, India, among the remote deciduous terrain of Tikli village a team coordinated by Artist Hunny Mor painted two leopards perched on branches on a water source tank 115 feet high. The campaign was aimed to spread awareness on co-habitation and environmental conservation. The art work can be seen from several miles across in all directions. Ron Finley's work as the Gangsta Gardener (or Guerrilla Gardener) of South Central L.A. is an example of an artist whose works constitute temporary public art works in the form of public food gardens that addresses sustainability, food security and food justice. Andrea Zittel has produced works, such as Indianapolis Island that reference sustainability and permaculture with which participants can actively engage. Interactive public art Some public art is designed to encourage direct hands-on interaction. Examples include public art that contain interactive musical, light, video, or water components. For example, the architectural centerpiece in front of the Ontario Science Centre is a fountain and musical instrument (hydraulophone) by Steve Mann where people can produce sounds by blocking water jets to force water through sound-producing mechanisms. An early and unusual interactive public artwork was Jim Pallas' 1980 Century of Light in Detroit, Michigan of a large outdoor mandala of lights that reacted in complex ways to sounds and movements detected by radar (mistakenly destroyed 25 years later). Another example is Rebecca Hackemann's two works The Public Utteraton Machines of 2015 and The Urban Field Glass Project / Visionary Sightseeing Binoculars 2008, 20013, 2021, 2022. The Public Utteraton Machines records people's opinions of other public art in New York, such as Jeff Koon's Split Rocker and displays responses online. New genre public art In