In general, high consumption of meat (especially beef) has a large climate impact while a vegetarian diet based on seasonal products grown locally is the most climate-friendly. Since food production is resource intensive, and treatment of organic waste generates greenhouse gases, waste of food is a major loss for society. For example, in the UK it has been estimated that the environmental benefit of reducing food waste from households to zero would be equivalent to reducing the number of cars by 20 per cent (WRAP 2011). The risk for burden shifting can be illustrated by the case of an energy efficient product that requires more materials for its production than a conventional option with lower energy efficiency.