Guardian: Over the nine years Ive spent trying to persuade business leaders to embrace sustainability, the question Ive most often been asked is, Whats the business case for sustainability? This question is always delivered in a skeptical tone, carrying the unspoken suggestion that there is no business case, or at least not a very compelling one. And, for those nine years, Id always wished I had a better answer.
Well, now I do. Its a billion dollars.
There are now at least nine companies globally...