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.
What percentage of carbon dioxide do we exhale? A: About 4 percent of exhaled air is carbon dioxide, and 16 percent is oxygen. The majority of exhaled air â approximately 79 percent â is nitrogen. Carbon di... Full Answer >