Explanation:

As global climate warms, plant life responds. In the Arctic, where surface air temperatures have risen at about twice the global rate, scientists are witnessing distinct shifts in where different types of vegetation grow over the last 30 years. Satellite data and field studies show that trees and shrubs are expanding by pushing northward, while the low-to-the-ground tundra plants to their north are shrinking in range. Predictions from climate models suggest that the changes in plant distribution in the Arctic will significantly infuence the global climate system. According to recent research, woody plants could expand by 52 percent in 50 years. Such profound shifts in plant distribution will result in an overall positive feedback to climate that is likely to prod more warming than has previously been predicted.