Re: What is the differnce is different types of smoke??

Carbon is a major component of almost everything on earth, including those 
in your list such as leaves, grass, paper, etc.  Hydrogen is also very 
common; substances containing both hydrogen and carbon are known as 
hydrocarbons.  When you burn these type of substances, the reaction is 
called a combustion reaction.  Combustion reactions occur when extreme 
heat (such as a flame) is applied to a substance in the presence of 
oxygen.  The main products of a combustion reaction are carbon dioxide and 
water.

At this point in our discussion, we have carbon, hydrogen, and oxygen 
involved in the reaction.  There are other components in the reaction that 
play a part in producing different types of byproducts.  These other 
components are what makes different types of smoke.  Each of those things 
on your list have unique components, which produces different byproducts 
in the reaction, which produces different types of smoke.  

Another important thing to remember about all reactions, including 
combustion reactions, is that very few, if any, proceed to 100% 
completion.  This means that there will always be byproducts and some 
leftover reactants at the end of the reaction.  This is called incomplete 
combustion.  In a complete combustion of a hydrocarbon, the only products 
left at the end are carbon dioxide and water.  In incomplete combustion, 
there are byproducts and unused reactants at the end, which produces 
different types of smoke.