Meet the Champions of Clean Tech

7 of 8

Big Energy

It stands to reason that utility giants like Shell, British Gas, and General Electric should be cast as the villains in the green tech start-up story--right? Not so, according to Cleantech Group CEO Sheeraz Haji. Existing fuel and electricity companies have been "incredibly active in the space," he says, pouring money into projects that focus on making their industries more efficient and eco-friendly--presumably preserving their bread-and-butter. British Gas recently led a $10.6 million investment in the clean energy start-up 4Energy, which creates low-energy cooling systems.