"Improve the quality of the environment, building exquisite Huaibei" is our **** with the responsibility, with the rapid development of the city, the city also appeared haze weather. The following conditions: ① Sulfur dioxide is mainly from the combustion of coal, oil and other fuels, factory emissions, etc.; carbon monoxide is mainly from the incomplete combustion of fossil fuels and automobile exhaust, etc.; therefore ① ② ④ will cause air pollution. Plants and animals exhale carbon dioxide, a component of the air, not pollute the air.

Therefore, the choice: D.

This is the first time in the history of the world that we have seen a lot of carbon dioxide.