What Causes Sea Level Rise?

People have been measuring local sea level at certain locations along the coasts for hundreds of years. And NASA has been measuring the global sea level for almost three decades. Over this time, scientists have observed that the global sea level has been rising. The ocean is about 7 to 8 inches higher now than it was a century ago. Why? Because Earth is getting warmer. Learn more at Find more fun videos, games, and articles about our planet at