James Roosevelt met his wife at a Roosevelt family gathering in the home of Theodore's mother, and James' son Franklin married Theodore's niece Eleanor. The Roosevelt Family is generally associated with the state of New York. Harvard University educations have been common among many members of the Roosevelt Family.
From the top: Air is 78 percent nitrogen, just under 21 percent oxygen, and the rest is water vapor, CO2 and small concentrations of noble gases such as neon and argon. There are several compelling reasons to use pure nitrogen in tires.
A: Only 0.000053 percent of air is composed of hydrogen, making it the ninth most prevalent gas in the air. Nitrogen takes the lead, making up 78.084 percent of air, more than one million times more space than hydrogen. Oxygen also makes up a large part of air at 20.947 percent.