When it comes to the consequences of global warming, some are more talked about than others. It is difficult to ignore, for example, bushfires that rage in Australia or hurricanes that sweep the United States.
However, some consequences of global warming are more subtle and thus go under the radar, such as permafrost melt. Permafrost is best defined as ground that remains frozen for a period of two years or longer, and many of the world's buildings and roads are built upon the stuff.
Permafrost takes several years to melt, but when it does, it can cause considerable damage to the structures resting upon it. Check out this gallery to learn about permafrost, the silent destroyer.