British gas machines rely not on electricity, but on natural gas. Britain is a developed country in western Europe and a big energy country. Britain mainly uses natural gas for cooking, with a natural gas coverage rate of over 80%. In other words, more than 80% people in Britain use natural gas as their daily fuel energy, and Britain also produces oil and natural gas. Britain may face a major risk of natural gas shortage. Since more than 40% of Britain's total electricity is generated by natural gas, the British National Grid warned that once there is a problem with natural gas supply, it will cut off power supply in some areas.