It is shown that periodic electromagnetic (EM) fields cause non-thermal effects on nonlinear charge transport processes in living organisms and ecosystems. In particular, such processes take place during respiration or photosynthesis and in hydrogen-bonded water chains present in interfacial water in cells, in coherence domains of water in the atmosphere and oceans. The nonlinear charge transport is mediated by solitons and bisolitons which are formed by single charge (electron, proton) or,

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... ectively, two electrons in a singlet state, that are selftrapped in the self-induced local distortion of macromolecules or water chains. Due to oscillations of their velocity caused by discreteness of chains, (bi)solitons emit EM radiation of characteristic frequencies, determined by the intensity of the redox processes. In the presence of the periodic field (bi)solitons attain additional oscillations, and, therefore, the frequency of their EM radiation becomes modified, which affects redox processes in particular and the whole metabolism in general. It is shown that (bi)solitons have some characteristic frequencies, with respect to which periodic EM fields have non-thermal resonant effect on their dynamics and stability. Relatively strong enough unbiased periodic EM radiation can cause drift of (bi)solitons in molecular chains, and, therefore, it affects charge transport processes. These results show that changes in the EM solar activity can have effects on metabolism of living organisms and functioning of ecosystems and indicate a possible danger of the EM smog in ecosystems.