Why is it commonly believed that carbon dioxide is responsible for global warming?
​

because it is a chemical

Explanation:

Because of pollution and other factors that contain carbon dioxide are warm, and it heats up the air.

Explanation:

Carbon dioxide levels in the Earth's atmosphere have been steadily decreasing. Carbon dioxide has a longer average lifetime in the atmosphere. The warming effect associated with carbon dioxide has remained unchanged

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.