1.   Diesel smoke Vehicles with diesel engines will be checked for smoke emission, using smoke meters.

2.   And air regulators clamp a tight lid on smoke emissions.

3.   She said that new emission standards for planes and trains were a year behind schedule and that plans for reducing smoke emissions from restaurants were two years late.

4.   Then there are those dangerous carcinogenic barbecue smoke emissions.

5.   They have clamped a lid on controlled burning despite arguments that it can reduce net smoke emissions by curbing wildfires.

6.   A Malaysian Cabinet minister has proposed that two-stroke motorcycles be fitted with catalytic converters from Taiwan to reduce smoke emission.

7.   Meanwhile, black smoke emission from vehicles was the subject of the most environmental complaints last year, figures showed.

8.   Noting that vehicles are a major contributor to air pollution, he said there was a need for stricter enforcement against smoke emission.