GAN-IUS... the GARDEN ("Gan" means Garden in Hebrew) HOUSE, with WALLs made out of PLANTs within a GlassHouse style structure... so INSIDE there is looots of O2 and only as much CO2 as 100 years ago (200 - 280 and not 390 ppm). Half CO2 - double easy living without any Hopsydol How? Lets find out !