Humans and Earths Atmosphere Whats in the Air?Humans and Earth's Atmosphere: What's in the Air? explores the composition of Earth's atmosphere, including gases such as nitrogen, oxygen, argon, and carbon dioxide. This informative book examines the balance of these gases and the consequences of having too much or too little of a certain gas. Readers will discover how everyday activities, like driving, heating buildings, and using aerosols, contribute to the release of harmful gases into the air