Water eco-environmental problems in Yangtze River economic zone attract more and more public attention. Gray water footprint as a marker to pollution degree is largely accepted. Estimation of industrial gray water footprints in Yangtze River economic zone is key to reach a quality economic development. This paper uses provincial input-output tables in Yangtze River economic zone in 2002, 2007 and 2012 to compile gray water footprint input-output table of Yangtze River economic zone, and estimates their gray water emission coefficients and footprints on imported industries. During 2002 to 2012, their direct, indirect and complete gray water emission coefficients in 16 industries are declining, and 12 are falling in complete gray water footprint while four rising which include food & tobacco industry, wood and furniture manufacturing, petrochemical industry and construction because of their expanding sizes, directly in construction and indirectly in the other 3 industries.

This paper, according to China's 30 provinces' panel data 2000 to 2016, uses non-expected DEA model to estimate China's whole element energy efficiency, and employs panel data model and media effect model to verify the media effect of technical advances during which financial growth pushes whole element energy efficiency. China's financial development level and energy efficiency generally show a rising trend, varying with regions, much higher in eastern China than in the central and western. Vertically financial growth shows the same changing trend as energy efficiency. Horizontally, the eastern China of highest financial growth level is also of highest whole element energy efficiency. Technical advance imposes a distinguished media effect during financial growth acting on the whole element energy efficiency.