Cars produce little VOCs and are not a significant source. When it comes to particulate matter cars are absolutely eclipsed by sea vessels, with a single cruise

Cars produce little VOCs and are not a significant source. When it comes to particulate matter cars are absolutely eclipsed by sea vessels, with a single cruise ship creating more than a million cars. VOCs -- irrelevant to this conversation. SOx, NOs, Particulate Matter -- A single cruise ship is worse than a million cars. The cruise ship industry absolutely eclipses cars by a magnitude+. Carbon -- cars produce a lot of greenhouse gases. That isn't an air quality issue, though, which is the topic that we're talking about. Cruise ships are an absolute disaster ecologically. Cars are bad, but again because cars are bad we have made incredible progress.