I Love Trees and admit to being a Tree Hugger. And happily so :)
Here is the video:
If the answer to the question posed was a surprise to you. That would be shocking to me. And would, sadly, be an indication of how well your perception has been managed and also how abysmally unaware of the real world you might just be- Not trying to be harsh, but, trees and plants being fed by carbon is just reality.
Recall my comment from this post- Geo-Engineering: Sucking up Carbon & Dimming the Sun to Cool Planet
"I'm going to hug a tree today and thank it for giving me oxygen, while I aspirate my carbon for it's food"
That video portrayed my statement so very well :)