[sionnsar]

Natural gas locked up in water crystals could be a source of enormous amounts of energy – and if a new technology delivers what scientists are claiming, then it could even be emissions-free too.

CO2-emissions free? I doubt that.

[decimon]

CO2-emissions free? I doubt that.

From the rest of the article, you doubt correctly. The claim is that the methane is displaced by carbon dioxide in the extraction process.