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by Team Treehugger, Worldwide on 05.23.07
Longer lasting tires, more miles per gallon—nitrogen in your pneumatics can go a long way…
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As summer weather gets people out on the water, here are some tips for better boating…
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A new study from NASA finds arctic sea ice did little rebuilding in 2005…
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About the nitrogen issue...
From a quick Google search, it looks like the supposed benefits of filling your tires with nitrogen are far from clear-cut:
St. Petersburg Times
Straight Dope
CarTalk
Toronto Star (paid)
Basically, from what I gather, it appears that the benefit of filling with nitrogen boils down almost entirely to gas seeping out of your tires at a slightly slower rate, and that simply checking the pressure every so often is enough. So I probably wouldn't pay for it (unless you know you can't remember to check your tires), but if you get it for free, why not?