Outsid eof your obvious, and may I say prodigious, ability to cut and paste very involved chemical analyses... I'd say you missed the part about trees producing CO2.
They don't; they consume it and produce oxygen... and apparently several biogenic monoterpenes (alpha-pinene, beta-pinene, etc.) which were not actually part of the discussion.
By the way biogenic would be "naturally occuring", as opposed to anthropogenic, which would be "caused by mankind."