Permafrost refers to layers of soil that often remain frozen throughout the entire year. Warmer summer temperatures have increased the thawing of permafrost in Alaska. As the permafrost thaws, organic matter begins to decompose. This decomposition contributes to global warming because:.

the decomposition of organic matter can emit carbon dioxide and methane into the atmosphere.

Explanation:

Permafrost refers to layers of soil that often remain frozen throughout the entire year. Warmer summer temperatures have increased the thawing of permafrost in Alaska. As the permafrost thaws, organic matter begins to decompose. This decomposition contributes to global warming because the decomposition of organic matter can emit carbon dioxide and methane into the atmosphere.