Energy and Diamond

Energy 

If we can make the above reaction happen, it releases energy as heat; because molecules in the right side of equation are in lower energy level. Based on Euler-Lagrqnge theorem, a system paths a way which minimize the energy consumption. Hence, in high pressure the above equation must happen. Similar reaction also exists. Laboratory experiments have confirmed that at a temperature of 300 °C (572 °F) and pressure of 500 bars, olivine serpentinizes with release of hydrogen gas. In addition, methane and complex hydrocarbons are formed through reduction of carbon dioxide. The process may be catalyzed by magnetite formed during serpentinization. One reaction pathway is (1):

Diamond

It can be that the carbon in the reaction appear in form of diamond. Actually, one of the methods of producing diamond is by methane in low pressure. Our equation is similar to that. If we are lucky, the reaction can give diamond too. In the case we are successful, we have turned two air pollutant molecules into energy, diamond and water.