Thawing of permafrost in the Arctic is due primarily to
A) climate warming.
B) increased development and construction.
C) increased precipitation.
D) rising sea level.
E) subsidence.

Question

Quizplus · Accepted Answer

Permafrost in the Arctic is composed of soil, gravel, and rocks that remain below 0°C for at least two consecutive years. Climate warming is causing the permafrost to thaw, as temperatures increase, the ground that was once frozen gradually thaws, causing the ground to sink and creating instability in the landscape. This can result in a range of impacts, including the formation of thermokarst lakes, landslides, and changes in vegetation.

Thawing of Permafrost in the Arctic Is Due Primarily to