In the current climate, 'going green' might not be at the top of most company 'to do' lists. Times are tough and there are numerous economic headwinds keeping us busy. So, am I wasting my time writing a blog post calling on companies to build sustainability into their business plans? Definitely not and here's why. In 2007 we set aside a massive £200 million for a five year project called Plan A (because there is no Plan B for the one planet we have), a sustainability programme that pledged to transform M&S by changing the way it did business.