Adopting a vegetarian diet based around meat substitutes such as tofu can cause more damage to the environment, according to a new study. It has often been claimed that avoiding red meat is beneficial to the environment, because it lowers emissions and less land is used to produce alternatives.But a study by Cranfield University, commissioned by WWF, the environmental group, found a substantial number of meat substitutes – such as soy, chickpeas and lentils – were more harmful to the environment because they were imported into Britain from overseas.The study concluded: "A switch from beef and milk to highly refined...