题目：What are the climate scientists＇ attitudes towards the influence of climate change on the deserted areas？
A.Definite
B.Dubious
C.Serious
D.Negative
文章倒数第二段提到“Evenso，climatescientistsdon’tagreeonhowfutureclimatechangewillaffecttheSahel：Somestudiessimulateadecreaseinrainfall.‘Thisissueisstillratheruncertain，’Haarsmasaid.”可知，气象学家在气候变化对沙漠地区的影响方面所持的观点是不确定的，犹豫不决的，故选B。
