On May 30, 9:38 am, phil hays wrote:
On Fri, 30 May 2008 10:54:39 +0100, Eeyore wrote:
0ZB0N wrote:

CO2 is "only" 1% of the atmosphere,

More like 0.35% actually.

0.35% in 1988.

April 2008 MLO has 387.19 PPM, or 0.38719%
Rounding fun
0.3872%
0.387%
0.39%
0.4%

Ok, let's just say 0%

A well designed and operated hydroponic grow room would round that
down to zero fairly quickly, if it weren't for those pesky humans
there.

ftp://ftp.cmdl.noaa.gov/ccg/co2/trends/co2_mm_mlo.txt