| Special Focus CLEAN FUELS Nations around the world have introduced new regulations for clean fuels production. These strict guidelines are an effort to mitigate airborne pollutants-carbon monoxide, nitrogen oxide, hydrocarbons and particulate matter-from vehicles' exhaust. New technologies have been introduced to produce fuels that adhere to these strict government regulations. This month's Special Focus details some of these new technologies and how they are optimizing the refining industry. Photo: The Neste Oil's Rotterdam refinery produces premium-quality NExBTL renewable diesel, which is the cleanest and highest-quality renewable diesel on the market. Photo courtesy of Neste Oil Corp.