Authorized sources, have stated, emphatically, that the most effective way to reduce CO2 emissions is fossil-fuel consumption reduction.We have been confirming it from 2008, as a consequence of abating pollution controlling CO2 emissions by magnetic action.In this paper, a balanced combustion using a MEB minimizer, is highlighted, from results.Sciences have revealed the stability of atmosphere gases proportions, for million years, with about 0.036% CO2 whose levels underwent slow fluctuations below 300 ppm for more than 400,000 years.However, since 1750, fossil-fuels burning have increased its concentration in the atmosphere about 50%.Fossil-fuel derived CO2 is a tiny component of the global carbon cycle, but it is cumulative because the natural carbon exchange cannot absorb all additional CO2.Therefore, the level of atmospheric CO2 is building up, and in approximately 120 years, after pre-industrial era, has increased in 100ppm.This results in an average concentration increase rate of . .A natural increase of 100ppm occurs in a period from 5000 to 20000 years, giving rise to maximum or minimum values of . or . , respectively.Consequently, the change rate of fossil-fuel derived CO2 is from 42 to 167 times greater than the natural one.Natural processes allow to restore the systems because they can change and after a relaxation time, equilibrate the new driving forces.When these are increasingly fast, the Earth systems cannot relax to equilibrate them, until sudden changes occur.Signs of those changes are frequent nowadays.Therefore, we cannot dismiss CO2 concentrations rate.It is a critical variable to control.Consequently, in this paper, Cyclical CO2 variations through the last 400000 years and Carbon cycle are detailly analyzed, and concentration rates reductions and its final steadiness, from results in two cars are shown, proving the MEB efficiency to control variations of CO2 concentrations rate.