Why Is Earth Getting Warmer? The Causes of Climate Change

Imagine wrapping yourself in a thick blanket on a warm night. You'd soon overheat. Earth has something like a blanket too — a layer of gases in the atmosphere. For thousands of years, this blanket kept our planet at just the right temperature. But what happens when that blanket gets thicker? Think about what you already know: have you heard the words 'greenhouse effect' or 'carbon footprint' before? Where did you come across them?