We live at the base of an imperceptible sea called the air, a layer of gases encompassing our planet. Nitrogen and oxygen represent 99 percent of the gases in dry air, with argon, carbon dioxide, helium, neon, and different gases making up minute bits. Water fume and residue are likewise part of Earth's climate. Different planets and moons have altogether different environments, and some have no climates by any stretch of the imagination. The air is so spread out that we scarcely notice it, yet its weight is equivalent to a layer of water in excess of 10 meters (34 feet) profound covering the whole planet. The last 30 kilometers (19 miles) of the environment contains around 98 percent of its mass. The climate—air—is a lot more slender at high heights. There is no air in space.