From his desk in midtown Manhattan Tariq Fancy once oversaw the beginning of arguably the biggest, most ambitious, effort ever to turn Wall Street “green”. Now, as environmentally friendly investing grows at an exponential rate, Fancy has come to a stark conclusion: “This is definitely not going to work.”

As the former chief investment officer for sustainable investing at BlackRock, the world’s largest asset manager, Fancy was charged with embedding environmental, social and governance (ESG) corporate policies across the investment giant’s portfolio.