BEIJING, June 4 -- Th preservation of wetland in China is under greater pressure than the global average, a remote sensing report said here Thursday.

According to the report issued by the Ministry of Science and Technology, the acreage of the world's top 100 wetlands had remain stable in the 13 years from 2001 to 2013, decreasing by less than one percent.

However, citing data collected by China's own constellation of remote sensing satellites as well as international open-source statistics, some 10 percent of world's wetlands are in China, and they are among the most heavily degraded of all ecological systems, according to the report.

This is the first time that remote sensing satellites have been used to survey and analyze wetlands on a global scale.

The report also pointed to a 1.2-percent increase in the agricultural output of maze, rice, wheat and soy, at 2.76 billion tonnes, in 2014.