User talk:2.50.242.210

There is a mistake in the chart, under the Oxides of Nitrogen (methods of control) instead of saying recirculation of exhaust gasses, it says recalculation. Which is rediculous. One might want to review the rest of the chart. Also perhaps a online textbook would be nice? Or copyright infringement? I mean the text was copied word for word from the IB Chemistry Textbook IBID press 3rd edition by John Green and Sadru Damji. 2.50.242.210 (discuss) 13:52, 12 August 2012 (UTC)