Two tourists drive a recreational vehicle in Tengeri Desert , on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. 

Tengeri Desert is seen beside the Huanghe river, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. 

A tourist walks to a yurt in Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. 

Camels rest at Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. 

-PHOTO TAKEN 22JUN06- A tourist walks across Shapotou park in Tengeri Desert on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region, June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. 

-PHOTO TAKEN 22JUN06- A tourist walks to a kiosk used to overlook a park in Tengeri Desert on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region, June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. 

Tourists travel on camels in Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said the problem was far from under control. 

A tourist walks to a yurt in Tengeri Desert, on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. Picture taken June 23, 2006. REUTERS/Jason Lee (CHINA) BEST QUALITY AVAILABLE 

Two tourists drive a recreational vehicle in Tengeri Desert ,on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A tourist walks at the edge of Tengeri Desert where the desert is controlled by a special grass structure on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

Tengeri Desert is seen beside the Huanghe river,on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A camel rests in Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region ,June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A man walks to a landmark in Tengeri Desert,on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A tourist walks to a yurt in Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) Also see image: GF2DSXLPBAAA 

Camel rest in Tengeri Desert ,on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

Camels rest at Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

Tourist travel on camels in Tengeri Desert, on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

Tourist travel on camels in Tengeri Desert, on the outskirts, in Zhongwei, China's Ningxia Hui Autonomous Region June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said the problem was far from under control. REUTERS/Jason Lee (CHINA) 

Tourists travel on camels in Tengeri Desert, on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 23, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said the problem was far from under control. REUTERS/Jason Lee (CHINA) 

A tourist leaves a kiosk used to overlook a park in Tengeri Desert on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region, June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

Tourists walk across Shapotou park in Tengeri Desert on the outskirts of Zhongwei, China's Ningxia Hui Autonomous Region June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A tourist walks across Shapotou park in Tengeri Desert on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region, June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A tourist stands in a kiosk used to overlook a park in Tengeri Desert on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region, June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA) 

A tourist walks to a kiosk used to overlook a park in Tengeri Desert on the outskirts in Zhongwei, China's Ningxia Hui Autonomous Region, June 22, 2006. China, which is plagued by sandstorms every spring, has embarked on a campaign to plant billions of trees and says it is slowing the rate of desertification, but leading environmentalists said problem was far from under control. REUTERS/Jason Lee (CHINA)