Bangaloreans may be soon able to breath some clean air. With the implementation of the Euro-III emission norms, pollution levels in the Garden City, which is now chocking with vehicular emissions, is expected to come down significantly. Complying with the Centre's directions, oil companies are supplying Euro-III standard fuel and to supplement the move, the Transport Department is registering only Euro-III compliant cars and jeeps in the city from April 1. ''Except for old Euro - II vehicles with dealers, the Regional Transport Offices (RTOs) in the city are registering only Euro-III standard four-wheelers from April 1 onwards,'' Transport Commissioner Om Prakash told.