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In the short term , the city is on track to meet its target of 40 % waste diversion by 2020 . Meanwhile , Phoenix is working hard with energy service companies ( ESCOs ) to reduce building energy use by 20 % for next year and targeting 15 % for renewable energy used city-wide from diversified sources . Ultimately , Hartman stresses the need to also prioritise economic and social sustainability . “ Environmentally there ’ s much we can do to raise awareness and make positive change but those outcomes must be achieved alongside economic and social
sustainability as articulated in the City ’ s General Plan — community health and education , equity , civil and human rights , and safe communities — in order to become a truly sustainable desert city .
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