Smoke White & Black

Black smoke is the charcoal or carbon particles, carbon powder from the remaining small.
Combustion engine. Diesel is mainly used as diesel bus Pickup vehicle. In general, large car. And the industry. Black smoke can also obscure.
To see the squalor and then. Also to the lungs by breathing into And accumulate in the air bag is made of lung cancer. Or substance to the conductor.
Lung cancer and can cause bronchitis.

White smoke from the engine has not been well-maintained.
Especially motocycle old White smoke is a substance or hydrocarbon fuel.
That has not been burned. Then be released through exhaust. Hydrocarbons.
When the sun being the reaction Create ozone, which forces the danger.

Operation of the engine. If the fuel is not burned completely. Will result in toxic emissions from exhaust, which causes major cause toxic air. These are toxic. Carbon monoxide gas. Black smoke hydrocarbon oxide of nitrogen, lead, etc..