Nitrogen is 77% of the atmosphere by weight. For reference at 1 mile is Denver Colorado (which while researching is enough to cause altitude sickness) with 18%

Nitrogen is 77% of the atmosphere by weight. For reference at 1 mile is Denver Colorado (which while researching is enough to cause altitude sickness) with 18% less atmosphere. Water boils at 200° F. If half the nitrogen was gone (38.5% of atmosphere), sea level world be equivalent to ~15,000 feet today) water would now boil at ~194.3° F.