underground subway systems Archives – The Green Optimistic green tech news, since 2008 Mon, 06 Sep 2010 14:02:11 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 2667534 Wind Tunnel Concept Converts Wind Energy Generated by Subway Trains into Electricity https://www.greenoptimistic.com/wind-tunnel-concept-20100906/ https://www.greenoptimistic.com/wind-tunnel-concept-20100906/#respond Mon, 06 Sep 2010 14:02:11 +0000 https://www.greenoptimistic.com/?p=10009 Metropolitan cities around the world build more and more underground subway systems in order to minimize the number of vehicles on the roads. The industrial designers also though to help city authorities by redesigning the current systems, making them more efficient.

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