Despite growing use of fossil fuels in many African countries due to development and economic growth, there has been a small but unexpected decrease in air pollution over some parts of the continent in recent years. According to new research, the change is most evident during the dry season in areas where grassland fires traditionally occur. The small seasonal decrease may not be enough to offset increasing human-caused air pollution in the long term, but it does show an interesting shift in the region. Researchers from the U.S., France, and Cote d’Ivoire analyzed satellite observations of air pollution from 2005...