Cleantech Forum XX, the Cleantech Group's 20th assembly of clean technology investors, entrepreneurs, service providers and other influencers since 2002, is underway in Shanghai, China.

And while the main session only begins a few hours from now, some themes have been emerging in pre-sessions, closed door meetings, VIP events and the welcome reception.

Flies on the various walls of the luxury Grand Hyatt Shanghai—the highest hotel in the world, occupying the 53rd to 87th floors of a downtown tower—would be hearing well connected capital and other insiders opining that: