CNN CNN Newsroom Live December 31, 2021 06:45:00
Covered in ice and snow, and that is a white reflective surface. as that snow pack diminishes and that snow line moves north and disappears, you have this dark earth and seawater beneath it that is suddenly revealed. that icy shelf will reflect about 80% of the sun's rays back out into space. when it's gone, it's absorbed back into the arctic sea, about ar -- antarctica. and in canada, as the perma frost melts, billions of tons of greenhouse gases have been safely stored for hundreds of thousands of years. and now we are looking at the potential of that thawing and billions of tons of greenhou...