Breathing Earth is a cool flash presentation that visually simulates this information using the most up-to-date data available. Check it out!
Implications - It is actually really cool how so much information can be accessed with a few simple clicks and strokes of the mouse and keyboard. As the world's population continues to grow, you are now able to see the numbers fluctuate as data becomes available. For visual learners, this is a great way to get a unique understanding of the world.