Your fuel/air mixture is too rich - either your fuel injector (carb) is not working properly or your air intake is clogged.
If you have some rubber/plastic with you that burns black.
Its not, sometimes its white or grey.
Black smoke issues from the chimney of the Sistine Chapel if a ballot fails to elect a new pope.
The texture of coal is a 'hard, shiny, black rock. However, the 'hardness' and the 'shininess' can vary depending on the impurities present. However, it is always black. The texture of coal can vary from Peat, )A black wet earth) coal in its early stages of formation. (Burns/combusts with a lot of smoke) Then Lignite ; a soft black rock, with no wetness. ( burns/combusts with less smoke). Then coal as described above ( burns/combusts with a hot bright flame, dependent on the amount of oxygen draught present). Finally Anthracite ; hard and shiny ( Sometimes known as 'Black Diamond'( burns/combusts with a hot bright bluish flame, dependent on the amount of oxygen draught present).,
it gives you cancer in your lungs.the tar in smoke turns your lungs black and it burns them
The smoke form burning tobacco can condense to form a black tar.
it burns oil... ur rings might be bad or if its just when you first start than its ur o rings Black smoke indicates excessive fuel (flooding). Blue smoke indicates oil. White smoke indicates coolant.
you can smoke just about anything that burns.
Burning polystyrene from foam plastic packaging creates dense black soot particles. Burning tires does the same.
The organic compounds having high ratio of carbon burn with black smoke (SOOT) as Aromatic compounds for example Benzene, C6H6.
Black smoke is just unburnt fuel in a diesel if the vehicle is not modified in any way to make this happen then something is causing it to not burn it all, it will not harm it but you should figure out why its not burning all of its fuel. (most diesels will spit out a little black smoke)
The question is not relevant. Either can be a wide range of temperatures. Sometimes "white smoke" is little more than condensate from steam, but it can also be oil vapor smoke, wood smoke or who knows what, depending on what is being burned. Black smoke typically has a high concentration of carbon but other than that the characteristics are similar.