And, although many of us probably imagine the permafrost regions as the tundra and ice lands of the far North, populated by polar bears and vast herds of caribou, much of the Northern Hemisphere permafrost is actually overlain by evergreen boreal forests.
(many of us; probably imagine; the permafrost regions as the tundra and ice lands of the far North) (the permafrost regions as the tundra and ice lands of the far North; populated; by polar bears and vast herds of caribou) (much of the Northern Hemisphere permafrost; is actually overlain; by evergreen boreal forests)
many of us the permafrost regions as the tundra and ice lands of the far North much of the Northern Hemisphere permafrost
probably imagine populated is actually overlain
the permafrost regions as the tundra and ice lands of the far North
by polar bears and vast herds of caribou
by evergreen boreal forests