题目解析:
你可以推断出,草原凹坑地区的碳封存依赖于不受农业干扰的土地。提示:...prairie potholes hold an average of 2.5 tons of carbon per acre per year when not being fanned; ...if the entire pothole region in the United States and Canada were to stop being farmed, the region would store about 400 million tons of carbon over 10 years....