What is the air composition percentage for other gases in the atmosphere?

The air composition percentage for other gases in the atmosphere is approximately 0.97%. This figure encompasses the invisible blend of various trace gases, which include carbon dioxide, argon, neon, helium, methane, krypton, and hydrogen, among others. Although these gases exist in much smaller quantities compared to nitrogen and oxygen, they play crucial roles in atmospheric processes and the overall dynamics of the Earth’s climate.

The selection of 0.97% aligns with the established scientific understanding of the atmosphere's composition, where nitrogen makes up about 78%, oxygen about 21%, and other gases constituting the remaining small percentage. While the other options represent percentages that might seem plausible, they are either slightly higher or lower than the established value, underscoring the significance of precision in recognizing atmospheric composition. Understanding these ratios is essential for HVAC professionals, who must consider air quality and its components when designing and servicing air conditioning systems.