"Each Carbon Offset Credit pays for the planting and long term care of one tree... As a thank you gift, you will recieve a certificate with your tree number and a photo of the tree. "
This sells for $40.00. For something like $12.00, I bought a crabapple tree and planted it in my back yard, where it adds to the value of MY property (while incidentally absorbing a few pounds of carbon dioxide every year).
Maybe I should sell a $40.00 carbon offset credit so I can buy my next tree or evergreen bush and have money left over.