Burning Season (IMAGE) Columbia Climate School Caption Intentionally set fires are a major source of air pollution in Africa, but they are declining in at least part of the continent. Here, a Kenyan farmer manages a fire. Credit Kyu Lee/Earth Institute, Columbia University Usage Restrictions Credit must be given. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.