Nitrogen, oxygen, argon, and carbon dioxide are all gases in Earth s atmosphere. But what happens when there is too much or two little of a certain gas? Readers will learn how every day activities such as driving, heating buildings, and using aerosols release harmful gases into the air and how it affects the air we breathe. Meets Next Generation Science Standards.

What is the atmosphere? -- The industrial revolution -- Fossil fuels -- Transportation and the atmosphere -- How can humans help?.