Eight energy and material flow characteristics of urban ecosystems.

Ambio · 2016 · PMC5055480 · PMID 27164949

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an increasing trendno p-value reported

Most flow budgets and intensity show an increasing trend over time (Warren-Rhodes and Koenig 2001 ; Kennedy et al. 2007 ; Baynes and Bai 2012 ), despite an increasing efficiency (Zhang and Yang 2007 ; Browne et al. 2009 ).

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