Or, alternatively, you could pick up a copy of Tamsin Blanchard's new book Green is the New Black (out 30 August), which is being touted as the must-have accessory for people who care about global warming and Marc Jacobs in equal amounts.

Blanchard addresses issues such as organic cotton, biodegradable shoes, fairtrade and how to shop without feeling guilty.

With tips on how to knit your own scarf and the best places to shop for vintage, it has plenty of good advice but here's one the publishers probably won't like.

Buy one copy and share it with your friends. Now that would be the greener shopping option. Pre-order from www. amazon. co. uk.