When women in Haiti added fruit flavouring to purified water and sold it to their peers, an impromptu community business was born. While the main aim was a health-related one – the women used purifying sachets distributed after the 2010 earthquake to clean the water – the unforeseen knock-on effect involved women educating their peers about not drinking contaminated water and running their own mini-enterprise. Read the rest of my piece on the Guardian Sustainable Business network.