Lethe200
Senior Member
- Location
- San Francisco Bay Area
I was reading about the warming climate and how it was melting the permafrost. Siberia has the largest area of permafrost in the world, but there are other countries too, such as Canada. The first problem people face are the mudslides and sinkholes (which are big and getting bigger).
But there are 2 other problems that can't be seen:
1) Permafrost is the biggest absorber of excess CO2. There is more CO2 stored in permafrost than many, many times what is currently in our atmosphere - and of course, current levels are already contributing to global warming. As permafrost thaws, that CO2 is released.
and this I did not know:
2) Our burning of coal throughout history produces not just visible air pollution - one of the elements in coal smoke is mercury. This highly toxic element goes into the atmosphere and into water....and thus into the permafrost. Tests have shown there are huge concentrations of toxic mercury stored in permafrost.
The destruction of permafrost, meaning that winters are becoming so warm that the permafrost cannot refreeze into thick layers, is therefore not only a danger from a global warming standpoint, but also because mercury is incredibly dangerous*.
* see Wiki: Mercury Poisoning
But there are 2 other problems that can't be seen:
1) Permafrost is the biggest absorber of excess CO2. There is more CO2 stored in permafrost than many, many times what is currently in our atmosphere - and of course, current levels are already contributing to global warming. As permafrost thaws, that CO2 is released.
and this I did not know:
2) Our burning of coal throughout history produces not just visible air pollution - one of the elements in coal smoke is mercury. This highly toxic element goes into the atmosphere and into water....and thus into the permafrost. Tests have shown there are huge concentrations of toxic mercury stored in permafrost.
The destruction of permafrost, meaning that winters are becoming so warm that the permafrost cannot refreeze into thick layers, is therefore not only a danger from a global warming standpoint, but also because mercury is incredibly dangerous*.
* see Wiki: Mercury Poisoning