A chemical-mechanical process whereby the contamination occurring through combustion of fossil fuels, petroleum and its by-products is reduced by altering the final chemical composition of the resulting gases; by reducing the totality of gases: SOx, NOx, VOC or HC, CO and CO2 and particle matter comprising the effluent and releasing a greater quantity of oxygen into the atmosphere than the one resulting post-combustion. A liquid chemical solution intervenes in this process, comprised of distilled water, sodium bicarbonate and urea, a mechanical device containing it that allows this solution to enter into contact with the gases from combustion, washing them, and also one or several filtering elements that are part of the mechanical device, comprised of a polymeric hydrocarbon fiber that chemically reacts in the presence of carbon, which produce the chain reaction of the resulting harmful gases in internal combustion engines, boilers, stacks, stationary or mobile sources, reducing their emissions and retaining the greater part of the solid elements and hydrocarbons inside the device and returning a gas effluent into the atmosphere that is richer in oxygen and has a very small amount of the remaining gases and particle matter than what was contained in the original effluent. <IMAGE>
