Most Britons underestimate the full environmental impact of cotton, thinking it takes only 314 litres of water to make a cotton T-shirt – which is only 12% of the true figure of 2,700 litres, according to a new report out today. Yet buying a certified organic cotton T-shirt rather than an ordinary one would save a staggering 2,457 litres of water – enough for one person to drink eight glasses of water a day for three and a half years. Consumers are being urged to save water in the supply chain by buying organic cotton T-shirts in a new study from the Soil Association – the trade body that licenses organic products and promotes organic farming, as well as the environmental charity Hubbub. Two in five Britons also said that while they care about the environment, it has not occurred to them that the manufacture of their clothing might have a negative impact on the planet, according to the new research. Read more at The Guardian.