How long can a person live without food and water or air?

Suffocation or Anoxia

How long a person can go without air is really a question of how long he can go without oxygen. It's further complicated if other gases are present. For example, breathing the same air over and over is more likely to be lethal because of the excess carbon dioxide rather than the depleted oxygen. Death from removing all oxygen (like a vacuum) may occur from the results of the pressure change or possibly temperature change.