The major benefit of diving with nitrox is that it has a lower concentration of _____, which limits our time at depth.

Diving with nitrox offers a significant advantage due to its lower concentration of nitrogen compared to traditional air. This reduction in nitrogen is crucial because it helps to limit nitrogen narcosis and reduces the risk of decompression sickness (DCS). When you dive, the body absorbs gases based on their partial pressures; with air, a higher proportion of nitrogen increases the risk associated with longer or deeper dives.

Using nitrox allows divers to extend their bottom time at certain depths without exceeding no-decompression limits, as the lower nitrogen levels mean that less nitrogen is absorbed by the body under pressure. This can lead to a safer dive profile and greater potential for longer dives than with regular air, as divers can ascend with a minimized risk of nitrogen-related issues.