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Sustainable development requires considering more than just environmental efficiency, but also equity. Some key challenges to achieving sustainable development include reducing the global population's usage of environmental resources in half, increasing income in the global south to at least 50% of levels in the north by 2050, and balancing economic growth with reducing the environmental impact per unit of consumption through technology and policy. Failure to address these issues could lead to problems like those that may have contributed to the collapse of ancient civilizations like Easter Island.























