Recently, I've been hearing snipits about having Nitrogen injected/inserted or 'put into' a vehicular's tires !!! This at first sounded a bit weird and wondered what "new gimmick" this was about. Just the other night while searching one of the local Dodge dealers in my area, I saw an ad on their website about " Come on in for some Nitro" -'South Oak Dodge is a Nitrogen Dealer' =
Nitrogen in Tires : Information about Nitrogen Tire Inflation News, Benefits, Generator Dealers, Location Finder & More
!! I just did a brief research and read about all kinds of benefits, like increased tire wear/better for the environment,better mpgs,less underinflation[ and less chance of blow-outs] due to Nitrogen escaping less than Oxygen from the pores of the rubber tire/sidewall !!! It seems like a good thing,but I just don't know [ enough yet] !!! I started wondering ,' Oh come on now,better for environment ? Heck, trees and plants certainly would/will give off enough oxygen to make up for the amount that is "locked up" in the "zillions" of tires in America [ and elsewhere] ! I have more to read and ascertain before I can pronounce an Independance Day from 'good old clean and pure Oxygen aka Air !

!! Here's one site :
Tire Stores Invite Customers To Get 'Nitro-Nized' With Nitrogen Tire Inflation 