1.   Carbon monoxide, a colourless, odourless and poisonous gas, is produced by incomplete combustion of carbon in fuels.

2.   A complicating factor, he said, is that because of incomplete combustion, the haze has an unusually high proportion of soot.

3.   According to critics, these flares, especially sour-gas flares, may be releasing dangerous levels of chemical contaminants because of incomplete combustion.

4.   Carbon monoxide is produced from incomplete combustion, that is, burning with limited oxygen.

5.   Carbon monoxide is a byproduct of incomplete combustion.

6.   It also eats carbon monoxide, a toxic gas produced by incomplete combustion, converting it into carbon dioxide.

7.   One problem is the many smaller, older incinerators, in which incomplete combustion releases more dioxin.

8.   This gas is produced by the incomplete combustion of fuel such as gasoline, coal, oil, natural gas, propane and kerosene.

9.   Worn spark plugs do not burn fuel efficiently, causing incomplete combustion, which means higher emissions from the tailpipe.

10.   A more significant health impact of PCBs may be caused by their incomplete combustion during thermal treatment processes.