In the glass manufacturing process, a large amount of fuel is consumed for melting raw materials. This also leads to the emission of harmful gases such as CO2. There is a demand to devise new manufacturing processes to cut down on fuel consumption. Companies such as Saint-Gobain (France) and Nippon Sheet Glass (Japan), which are the major players in the insulating glass window market, are formulating new ways to reduce fuel consumption, which will not only reduce their production costs but also help in complying with many carbon credit regulations. This would help these companies achieve sustainable growth.