Fuel Cycle Emissions (image) Rice University Share Print E-Mail Caption Rice University researchers have determined the most climate-friendly use of natural gas is replacement of existing coal-fired power plants and fuel-oil furnaces rather than burning it in cars and buses. Credit Tanyia Johnson/Rice University Usage Restrictions For news reporting purposes only. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.