Planting and taking care of a tree is an easy task, even for those of us whose thumbs aren't exactly green. It can be a fulfilling and rewarding experience to watch it grow from a sapling into a tall, leafy tree. And the rewards aren't only personal… they can reach a global scale.

A recent project raised by United Nations environmentalist Wangari Maathai, suggests a world wide project to plant a billion trees to fight global warming, pollution, or the CO2 content that is currently heating our atmosphere.

"If you put your head inside a black plastic rubbish bag and breathe in and out five times, that's what the CO2 concentration is going to be like in 50 years," says Tony Simmons of the World Agro Forestry.

So make a difference this weekend. Grab some friends, get some gardening gloves, and take a run to the local landscaping store. If you're unsure of what to do, or would like some more information, check out these websites.

Treesaregood.com | Arborday.org | Worldagroforestry.org