Political controversy erupts over ethanol levels in fuel and regional issues in southern India

Controversy arises in southern India over ethanol blending levels in petrol following Karnataka government tests that reported up to 31.2 percent ethanol in E20 fuel. Kerala has started fuel inspections amid complaints of engine damage and lower mileage. Public sector oil companies and the BJP dispute the testing methodology. Additionally, southern cities face severe post-Diwali air pollution causing health concerns and event postponements. The situation includes political tensions in Kerala linked to actor Mammootty's visit to a BJP leader's residence.