Plant N Tree: Buy a tree and become carbon neutral

Carbon jargon: How trees capture and store carbon - Carbon Neutral Blog

How important are trees to human existence?

Biological Carbon Sequestration

Carbon Offset Program - Reduce Carbon Footprint

Companies that joined Tree-Nation

No One Way To Be Sustainable: On Becoming A Carbon-Responsible Business - Fresh Cup Magazine

How to make trees better

Carbon Neutral Isn't Enough - Worth

Frankincense trees—of biblical lore—are being tapped out for essential oils

City Trees and Soil Are Sucking More Carbon Out of the Atmosphere Than Previously Thought, The Brink