DiNapoli said he is withdrawing his resolution, which was filed in response to a U.S. Environmental Protection Agency progress report last summer that said PCB concentrations were higher than expected in some areas outside the project's footprint.

WSJ: GE to study Hudson River cleanup expansion

Much of the talk at this week's conference was how major urban centers could work toward adhering to the Kyoto Protocol, the existing environmental treaty that sets targets for nations to reduce greenhouse gas concentrations.

CNN: Bill Clinton to cities: Act on climate