What is the primary gas found in air that Nitrox has less of?

Nitrox is a blend of nitrogen and oxygen that contains a higher percentage of oxygen compared to regular air. The primary gas in air is nitrogen, which makes up about 78% of the atmosphere we breathe, while oxygen comprises approximately 21%. When divers use Nitrox, they typically utilize a mixture with a higher oxygen content and a reduced amount of nitrogen.

By decreasing the nitrogen content, divers using Nitrox can help minimize the risks of nitrogen narcosis and decompression sickness, leading to safer diving practices. This modification in gas composition is key for divers who wish to extend their no-decompression limits and enhance their overall diving experience.

Therefore, the correct response identifies nitrogen as the primary gas in air that is found in lesser amounts in Nitrox, highlighting its importance in the context of diving safety and gas management.