Quote:
Originally posted by MrSelfDestruct
Here's another thing to consider: Ethanol reduces emissions, but at the same time, it increases gasoline's propensity to evaporate. The extra evaporation pollutes more than the emissions that were eliminated by its presence.
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That is true but to what extent I'm not sure. No matter how good the controls are and how well the underground tank is sealed there are still vapors that escape.
One of the larger issues is that although increasing the oxygen levels will reduce CO emisssions (by converting to CO2), the increased oxygen also creates more NOx emissions. Engineers were thinking that the NOx increase would be small compared to the CO decrease but in most cases it's been much worse than planned. Both are ozone precusors and NOx is worse than CO.