Delhi authorities impounded 28 goods-carrier buses and penalized over 2,500 vehicles for violating pollution-under-control certificate norms between Thursday and Friday. Additionally, 28 PUC centers were suspended, and 100 buses have been impounded this month for pollution violations. Transport Minister Pankaj Kumar Singh emphasized strict enforcement of pollution norms while ensuring vehicle owners face no inconvenience obtaining certificates, with actions taken against centers issuing forged certificates.