National Geographic : 2008 Apr
11 tast MEGE Last ear erecycled over Pe l oave o rees fl Trees do more than beautify our world. They help clean the air of carbon dioxide - a major greenhouse gas. As North America's largest recycler, we're ensuring that more trees can keep up the good work. And with thousands of commercial and community recycling programs nationwide, the results are truly adding up. From everyday collection to environmental protection, Think Green. ' Think Waste Management. www.wm.com/thinkgreen WASTE MANAGEMENT Think Green.