Evaporative Emissions

Some articles on emissions, evaporative emissions:

Urban Forest - Benefits - Air Pollution Reduction
... Vehicle emissions, emissions from industrial facilities, gasoline vapors, and chemical solvents are the major sources of NOx and VOCs ... Lower temperatures reduce emissions in parking lots Temperature reduction from shade trees in parking lots lowers the amount of evaporative emissions from parked cars ... Although the bulk of hydrocarbon emissions come from tailpipe exhaust, 16% of hydrocarbon emissions are from evaporative emissions that occur when the fuel delivery systems of parked vehicles ...