Soure+of+pollutants

Sources of pollutants
Carbon monoxide- Naturally comes from- forest fires- Man made sources: Car-exhausts and incomplete combustion of fossil fuels 2CH4 (g) + 3O2 (g)--->2CO+4H2O Video: http://www.youtube.com/watch?v=wKIrbq2pWvw

Nitrogen Oxide- Nuturally coms from forest fires- Man made sources: Factories, powerplants and from transportation N2(g)+O2(g)> 2NO (g) Rate determination step 2NO(g)+02(g)> 2NO2 (g)

Sulphur dioxides- Naturally comes from volcanoes Man mades sourcesL Industry especially when burning coal: S(s)+ O2 (g)---> SO2(g) 2S(s) + O2 (g) > 2SO3 (g)

Particulates: Naturally comes from: soot,dust,forest fires,volcanoes Man mades sources: factories and the burning of coal and diesel

Hydrocarbons: Naturally comes from: living and decaying plants Man made source: Partially burnt fuel

And have a crossword, focusing on fossil fuels: http://www.creative-chemistry.org.uk/funstuff/xword/fuels.htm (Note: I had problems getting this to work on Internet Explorer, for some reason.)