Not the sturdiest storage bag for freezing purposes; sometimes they will spring a leak in thawing process (themamaneeds.com)
«The presence of old carbon does not necessarily mean a permafrost feedback is occurring, because old carbon can [still] be released by natural seasonal thaw processes in permafrost systems,» said Joshua Dean of Vrije Universiteit Amsterdam. (environmentalresearchweb.org)
This thawing process gained greater urgency following the U.S. government's decision last year to delay approval of TransCanada Corp's proposed Keystone XL pipeline, a conduit for oilsands product. (canadianbusiness.com)