Encyclopedia of Earth
Encyclopedia of Earth: Terrestrial Biome
Gives short descriptions of the many different types of biomes found on land all over the world. (Updated: February 22, 2013)
NASA
Nasa Earth Observatory: Land Cover Classification
Learn about the important resources our land offers us: food, water, oxygen, building materials, and more. Discover how scientists have been mapping land for years trying to prevent disasters and to collect environmental information.