The author's experimental studies shown that magnetic poles (magnetic charges) are real structural components of atoms and substance. It is the magnetic poles, and not the electrons moving are direct sources of all magnetic fields in nature. The main reasons for ignoring magnetic charges in physical science are the hard conditions for their confinement in the structures of substance which is fundamentally different from the confinement of electrons, as well as the vicious electric magnetism of Maxwell (1873). True magnetic poles have been “buried alive” in physical theory under such theoretical surrogates as the magnetic moments of electrons. The electromagnetic shells of atoms composed of electric and magnetic charges are the sources of gravitational field which is the vortex electromagnetic field and is described by vortex vector rot[E – H]. Depending on the state of vortex vectors rot[E – H] in the composition of gravitational fields (GF) emitted by atoms, these fields are subdivided into paragravitational (PGF) and ferrogravitational (FGF). The sources of ferrogravitational field are repelled from sources of paragravitational field, for example, from Earth. The forces of such repulsion depend on the degree ferropolarization of gravitational field of atom - source of FGF, and the physical manifestation such repulsion is еthe effect of the ferrogravitational levitation (FGL), which discovered and investigated by the author. The FGL effect is also realized between the atoms emitting PGF and FGF in the formulations of chemical compounds. When an external FGF acts on CO2 molecule the process ferropolarization of gravitational field of oxygen atom is realized, which should be defined as the gravito-plastic source. In this case, the carbon atom, which is the gravito-stable mass, remains of paragravitational. At interatomic distances <1 Å the forces of the gravito-levitation repulsion may be very significant and lead to the rupture of chemical bonds between oxygen and carbon atoms and to the disintegration of the molecule CO2. It is highly probable that the process of decomposition of CO2, similar to that described above, is carried out in the cells of leaves of green plants, which emit precisely the ferrogravitational field. The decomposition of CO2 by FGF and the supply of oxygen to green plants is natural process that takes place in leaf cells called photosynthesis. However, photons in this process are only a stimulating factor contributing to the ferropolarization of gravitational field emitted by atoms oxygen in the composition of green plant cells.