east river energytony is really cool
and so is this article about hydropower turbines that generate energy from the flow of the east river
...in December 2006, an innovative energy company ...planted two state-of-the art turbines in the East River. They spin with the ebb and flow of the river's tides, turning the water's boundless energy into electricity (as long as dead bodies don't get stuck in the blades).
via world changing
mini-turbines in every pipe and drain? the water tunnels also providing power as fresh water flows into the city. ocean turbines? i imagine that a place like the bay of fundy could produce a lot of power - maybe even enough for the biggest starbucks sign ever that just went up on manhattan avenue. at night the marquee lights up the entire block!