According to the National Geographic, rainforests could vanish from the planet completely within the next century if current deforestation rates continue." Here's a really cool infographic that illustrates the many, many reasons why we can't let that happen:
You've Heard About This Problem With Our Trees, But Do You Really Know How Big It Is?
A good infographic on Deforestation. My students have been doing DNA barcoding to identify species of trees, and determine the native species that best sequester carbon dioxide. I thought this infographic did a good job of simplifying why deforestation is an issue worldwide.