Outdoor Co2

Discussion in 'Advanced Growing Techniques' started by KillerGenius, May 22, 2006.

  1. Has anyone ever tried this? specifically the yeast and sugar method.
  2. outdoor co2 levels = 410ppm.

    not sure how u would increase the whole of the outsides co2 levels, tho u could wait a few years and let fossil fuels do the work for u.

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