Answer:
Because the tundra traps carbon dioxide in a layer of permafrost.
Step-by-step explanation:
The Tundra is a cold and inhospitable biome with a type of sparse vegetation, largely undergrowth. It is considered the coldest biome on Earth. The tundra is present at the top of the northern hemisphere of the globe, in the region of the Arctic Circle. It covers countries like Russia, Greenland, Norway, Finland, Sweden, Alaska and Canada.
In Tundra, the winds are very strong with low rainfall. The climate that characterizes the regions where the tundra develops is polar, that is, dry with intense cold most of the year.
The tundra is made up of two seasons. In the short summer (about 2 months) the days are long, reaching temperatures of a maximum of 10 ° C. Unlike the long winter (about 10 months), which has shorter days with negative temperatures, which can reach -40 ° C. In this way, the tundra soil is shallow and formed by earth, rocks and ice. It is called “permafrost” (permanently frozen), which indicates its freezing for most of the year, making it difficult to have a large vegetative variety. In this way, trundo is able to capture carbon dioxide and trap it in permafrost for millions of years, preventing it from returning to the atmosphere.