In recent years, the amount of carbon dioxide in the atmosphere has been rising. Scientists believe that higher levels of carbon dioxide in the atmosphere are causing the world’s climate to change. Since trees absorb carbon dioxide when they grow and other material in forests contain carbon, forests help reduce the amount of carbon dioxide being released to the atmosphere. FAO wanted to discover how much carbon is held by forests worldwide. Be sure to check out the lesson plans for both this Inq Topics: Carbon, Carbon Cycle, Carbon Dioxide, Carbon Storage, Photosynthesis.