Environmentalists fear that storing carbon dioxide at sea would cause the water to acidify, disrupting marine ecosystems. Natural ocean trenches could provide a cheap , quick and large - scale means of storing carbon dioxide ; however , scientists have warned that so could cause major environmental problems , wrote Sarah Smith in the Financial Times .
Natural ocean trenches could provide a cheap , quick and large - scale means of storing carbon dioxide ; however , scientists have warned that so could cause major environmental problems , wrote Sarah Smith in the Financial Times .