Sustainable development is defined as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs. The concept of needs goes beyond simply material needs and includes values, relationships, freedom to think, act, and participate, all amounting to sustainable living, morally, and spiritually. The concept of sustainable development was introduced in 1987 (Brundtland Report). Analyze on how sustainable development has been implemented, criticize the implementation of the concept of sustainable development in the past thirty years and propose the applicable strategies that are able to tackle any challenges during the implementation. Keep your write up within 1000 - 1500 words