New Delhi becomes world's most polluted city after Diwali firecracker defiance

New Delhi has become the world's most polluted city after a surge in air pollution linked to Diwali celebrations. Many people ignored a ban on firecrackers, leading to hazardous air quality levels, with an index reading of 348. The local government has struggled to enforce the firecracker ban, despite it being in place for several years. Some groups argue that the ban disrupts festival traditions, while officials maintain it is necessary for public health. The pollution is worsened by seasonal farm waste burning in northern India, which combines with emissions from various sources. This annual issue typically intensifies as winter approaches.