Some scientists have called thawing permafrost a time bomb cite to piece evidence why

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.

Adirect relationship can be represented by: a curve a pie chart