With 89% of Australians living in urban areas, we think that learning to live sustainably in cities is pretty important. For your chance to win one of six copies of Hippies in the City by Rita Balshaw, tell us in 25 words or less why you (or someone you know) need to read this book.

Become part of the Green Lifestyle Pinterest community and you could win some great prizes from Biome. If you think you're Pinterest-savvy, set up your own 'green lifestyle' folder and we'll judge the best one to get a $100 Biome voucher, and a $50 voucher for the two runners-up!