An external study has concluded that, on a life-cycle analysis basis, a ‘Shell GTL system’, compared to a ‘crude oil refinery system’, has no greater impact on global warming and has a significantly lower impact on air acidification and smog formation, and lower emissions of particulate matter. PricewaterhouseCoopers LLP was engaged by Shell International Gas Limited to perform a life cycle assessment to compare technologies producing alternative transportation fuels. The full transscriopt of this document is available on the Shell Gas & Power website | 
