What is the percentage of nitrogen in the air?

The correct answer is 79.1%, which represents the approximate percentage of nitrogen in Earth's atmosphere. Nitrogen is the most abundant gas in the air, making up about 78% to 79% of the atmosphere by volume. This high concentration plays a significant role in various environmental and biological processes, as nitrogen is essential for life but does not support combustion. Understanding the composition of the atmosphere is crucial in fields like environmental science, meteorology, and even in the study of combustion and gas dynamics, as it provides context for how gases interact and affect various processes on Earth.