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fuel and emission control system changes include:Limits on gasoline volatility
• Limits on gasoline volatility Volatility is a measure of how easily a liquid evaporates. As described earlier, some toxics such as benzene are present in gasoline and get into the air when gasoline evaporates. Limits on gasoline volatility have been imposed over the last several years to control evaporative emissions of both hydrocarbon and toxic compounds (most air toxics are hydrocarbons so programs designed to reduce hydrocarbon emissions also reduce air toxics).
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