[yread]

You can always look at different statistics. If you count deaths per journey, air doesn't look that good anymore http://en.wikipedia.org/wiki/Air_safety#Statistics

[nitrogen]

Deaths per journey is a silly statistic. People don't fly to the neighborhood supermarket to buy their groceries. All the inconsequential car trips at mostly sub-lethal speeds would significantly deflate an automotive death-per-journey statistic.