If we look at some of the statements around how second-hand smoking in cars is damaging—not quite what it's going to do; I'll come to that in a moment—we have a large amount of evidence showing us that in a vehicle where there's second-hand smoking, even if the window is halfway down, even if there is air conditioning on, the New Zealand Medical Journal tells us that it's still as if you were in a smoky pub. Absolutely. You might think just winding the window down or turning the air conditioning on will make a difference, but still: significant second-hand implications.