Questions and Assignments

Use the tools and the concepts learned so far to discuss and determine answers to the following questions:

• What is permafrost? Where is it found?
• What changes have been observed in permafrost characteristics in recent times?
• What is the active layer of the soil? How is it affected when permafrost thaws?
• Why is methane, a greenhouse gas, released into the atmosphere when permafrost thaws?
• What are the possible impacts of permafrost thawing on the Earth’s climate?