Perhaps unsurprisingly, given the continued male dominance of the executive classes, our compilation of climate-active CEOs has so far turned out to be a predominantly white man's club (I would welcome any nominations to this list that prove me wrong - I am fully aware this may be my white male privilege showing through). Juliet Davenport, CEO and founder of UK wind energy company Good Energy, is a notable exception to the boys-only rule. She has pioneered one of the UK's leading clean energy brands, selling renewable electricity direct to consumers through Britain's deregulated energy markets. She's been an outspoken advocate of the notion that we can't wait for elected officials to catch on to the urgency of the climate change issue, and her expertise have been tapped by everyone from government ministers to the UK's energy regulators, OFGEM. The open controversy between Davenport's Good Energy and Dale Vince's Ecotricity may be an important reminder that even among us greens, divisions exist and passions can run high. But from where I sit, both companies are pushing the conversation forward. And that can only be a good thing.