The Most Environmentally Friendly Tree

Slate Magazine looked into finding the most environmentally-friendly trees. The answer focuses mostly on limiting your carbon footprint through carbon-sequestration instead of other environmental issues (like, is it native?). Of course, the answer turns out to still be different for different places. But, after playing the game and finding out about new high-sequestration trees, they drop in a real kicker at the end:

Of course, if you have enough property to plant six yellow poplars in the first place, your carbon footprint may be a lot higher than that.

There is no mention of how Truffula trees hold up.