Schauberger
Therefore it is also a mistake to believe that plants breathe in carbones and breathe out oxygen, which can be proven as follows: If the tips of enclosed stands of conifers are observed on very warm and windless days at about noon, then delicate transparent wraiths of mist can be seen, which waft upwards and disintegrate on exposure to excessive light and heat.[15] This is a sign that decentrating forms of emulsion are taking place. That is, the upwardly radiating carbones, which become passive (inactive) with strong light and heat, are being bound by the aggressive oxygen influence, which happens under a negative (rising) temperature gradient. In my own experience this also leads to the drying up of high-lying true springs, which can only rise under conditions where the oxygen is in a diffuse state. If these vapour formations appear above the tops of the trees, then it is certain to rain after about 4 hours. This prompted watchful foresters of old, who were close to Nature, to pack a raincloak in their rucksacks for the afternoon shift. If the opposite emulsive process takes place, i.e. if the downwardly radiating terrestrial energy, which becomes highly active under a positive (falling) temperature gradient, binds the excess oxygen, which becomes passive [The Energy Evolution - Harnessing Free Energy from Nature, The Catalysts]