Methane -- Final (video) Stanford University Loading video... Caption One advantage of natural gas is that it emits less carbon dioxide than other fossil fuels. But releasing unburnt natural gas into the atmosphere contributes significantly to global warming. That's because natural gas is mostly methane, a greenhouse gas 30 times more potent than carbon dioxide. Stanford's Adam Brandt and colleagues have found that methane leakage from the US natural gas infrastructure is much higher than official estimates, a problem that can be addressed by the industry. Credit Mark Shwartz/Precourt Institute for Energy, Stanford University Usage Restrictions Graphics, photographs and videos provided by the Precourt Institute for Energy at Stanford University are to be used - with appropriate credit - for editorial purposes only. Flopping, altering, editing or otherwise embellishing these images and audio clips in any way that changes the editorial content of these images and audio clips is prohibited. Permission is for one-time use only. Supplied image file must be deleted after use. 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.