Recently, it is very popular to live a low-carbon life. It not only results from the promotion of the government but also rises out of the people’s internal heart. Living a low-carbon life is of great importance to every one. First of all, it can protect the environment to a great extent. Second, it can save the limited natural resources and energy, and will leave a better world for our offspring. Third, it is a healthy lifestyle and will help mould a harmonious social atmosphere. Therefore, ...