it will cause pinging running your combustion hotter
Yes, a scratched piston will cause problems with compression. It scratches the cylinder wall and causes wear on the rings.
no
Pollution.
Combustion, yes can cause ozone issues. This is due to unburnt hydrocarbons.
a hydrocarbon
Spontaneous combustion occurs when materials oxidize in a manner that creates heat in the material which cannot be dissipated until the overall temperature exceeds the combustion temperature. No ecternal source (initioation) by a hot point is required.
Combustion. Any reaction that has O2 as a reactant is combustion.
a hydrocarbon
No
a hydrocarbon
Weathering of any kind can sometimes cause problems, like erosion of topsoil. Biological weathering, where the weathering is caused by living things (plants and animals), can cause the same kinds of problems.