We need to cut carbon emissions, and soon. But Nick Bardsley reminds us that any mechanism that we introduce in order to cut them - such as Cap and Share - will have to be accompanied by a number of other measures or it will prove counterproductive. Topics covered in his paper include a proposed substitute for the much-criticised Clean Development Mechanism, the current displacement of food production by biofuels, the relationship between food and energy use, the required shift away from debt-based money and the need for a land value tax.