Irregardless of your beliefs, the phrase was used in a perfectly crommulent way.
We know they help convert Carbon Dioxide back into Oxygen, but we don't know how exactly.
I'm not sure what you're talking about -- the exact procedure plants use to take in carbon dioxide, and emit oxygen gas, is mapped out in as much detail as any part of science I know of; it includes the multi-stage fate of individual electrons!
Wikipedia, as usual, provides a high-level overview:
http://en.wikipedia.org/wiki/Photosynthesis#C4_and_C3_photosynthesis_and_CAM
The major difference between bonds and bond traders is that the bonds will eventually mature.