Complex sentence: The description of most interesting electronic effects (capacitance, electrical conductance, electric-field screening, band bending, etc.) demands at least some kind of rudimentary inclusion of electron-electron interactions, such as electrostatic mean field theory with space charge.
Split into simpler sentences: The description of most interesting electronic effects (capacitance, electrical conductance, electric-field screening, band bending, etc.) demands the inclusion of electrostatic effects. This requires some model of electron-electron interactions, such as mean field theory with space charge.