Owners of 35 of them are within the scope a 'prohibition notice' because the opacity of smoke emitted by their vehicles exceeds 70%. This is mainly buses and trucks that have been sanctioned. They no longer have the right to drive on our roads.
To reduce the pollution caused by vehicles at a reasonable level, the country now imports Diesel 50S. This new grade of fuel that contains less sulfur than diesel 500S currently used, is less polluting to the environment. It is close to the standards in Europe and North America, and will have no negative effect on vehicles that have old engines.