Its a perfect combo....water + air....absorbed through the stomata I would imagine...I don't know the exact science but I do know what I see working... It works brotha.... Try it out.. you wont be dissapointed... I go back there twice sometimes 3 times a day... each time... mist the clones, mist the babies and then mist the flowering room... very generously... I get the leaves shiny and wet....