These particles, which are the primary constituents in thick black exhaust smoke, are small enough to be deeply inhaled into the lungs and retained in the body. Particulates adversely affect the respiratory system, especially in elderly citizens, the young, and those suffering from respiratory problems such as asthma and emphysema. Return to list Environmental effects of diesel exhaust. The NO x contribution to ozone formation also increases the amount of damage to crops and indigenous plants. Particulates have a great impact on visibility.
Particulates also deposit as sooty residues on buildings and automobiles.
Return to list Common causes of exhaust smoke. Faulty injection pump Return to list How to reduce smoke emissions. Maintaining your vehicle according to manufacturer specifications and ensuring that the engine's emission control equipment is working properly are the most important ways to reduce smoke emissions. Clean emissions means your engine is burning fuel efficiently, and that translates into savings for you. Everyone benefits from cleaner air.