Tammy Newmark has proved it’s possible for investors to make money while saving the planet and alleviating poverty. She tells Christopher Cundy how

California’s ambitious renewables and carbon targets are set to revolutionise its electricity system, with Cal ISO at its centre. Its CEO Stephen Berberich talks to Felicity Carus

APG's Claudia Kruse talks to EF about the Dutch pensions giant's commitment to sustainability

There is a chronic need for finance for low-carbon infrastructure and companies – yet a dearth of suitable investment products, Green Investment Bank adviser Dima Rifai tells Mark Nicholls

California’s aggressive clean energy and carbon targets put it at the forefront of US efforts to tackle climate change – and Clean Energy Fund president Dan Adler is right in the middle of the action. He talks to Gloria Gonzalez

As chairman of an influential parliamentary committee, veteran Tory MP Tim Yeo has proved an effective critic of UK climate policy. He talks electricity market reform and emissions with Mark Nicholls

David Brand has parlayed pioneering environmental market trades into a billion-dollar forest asset management company – but the real environmental upside is yet to come, he tells Mark Nicholls

Despite her US base, the first bets the head of private equity investments at Deutsche Bank Climate Change Advisers is making are in China. Gisele Everett talks clean technology and policy with Gloria Gonzalez

Michael Wilkins is leading the effort at rating agency Standard & Poor’s is to factor climate risk into credit scores – a breakthrough for the integration of environmental factors into the investment mainstream. Mark Nicholls reports

Jerry Brown – ‘Governor Moonbeam’ – is back in charge in California, with a clean energy agenda that is set to lead the US. Felicity Carus reports

Investment is urgently needed to save the world’s tropical forests, but efforts of investors such as Hylton Murray-Philipson have been hobbled by slow progress towards an international ‘REDD’ framework. He talks to Mark Nicholls

The lessons of the mobile phone revolution should be applied to the fight against climate change, according to the International Finance Corporation’s new climate head. Mark Nicholls reports

Malcolm Preston, global head of sustainability at PwC, says investment throughout the recent recession is paying dividends. He talks to Mark Nicholls

Cisco DeVries, the creator of the pioneering PACE programme to finance renewables and energy efficiency, is confident the concept will yet see off an assault by federal agencies. He talks to Gloria Gonzalez

As head of Barclays Capital’s environmental markets desk, Louis Redshaw has taken a deliberate, even cautious approach to building the business. But, as he tells Mark Nicholls, the current environment offers a chance to up the ante

From civil servant to NGO founder to private sector adviser – and now head of the UN’s climate secretariat. Christiana Figueres talks to Katie Kouchakji

Office of Environmental Markets director Sally Collins is helping to build US ecosystem markets from the bottom up. She talks metrics, measurement and market infrastructure with Christopher Cundy

Jeff McDermott used to run investment banking at UBS – but now he’s turning his 25 years of deal-making experience to the clean technology sector. He talks to Gloria Gonzalez

Despite its impressive pedigree, Green Exchange has struggled to grab market share from earlier movers. But are things set to change with its new CEO? Tom Lewis talks to Mark Nicholls

Recession and a drift in climate policy have challenged pioneering low-carbon asset management firm Climate Change Capital. But recently appointed chief Shaun Mays remains bullish, Christopher Cundy reports