鉴于本人对世界干旱、半干旱地区及沙漠问题的关心,借机对中国黄河上游的西北沙漠地带以及阿拉伯联合酋长国沙漠地带等进行了考察.通过考察,回答了为什么要研完全球范围内的干旱和沙漠问题,回答了为什么必须对沙漠和干旱地区进行绿化的问题.防止干旱地区沙漠化的主要措施是植树,而植树的先决条件又是兴修水利. In view of my concern for the world’s arid, semi-arid and desert areas, I took the opportunity to examine the desert areas in the northwest and upper reaches of the Yellow River in China, as well as the desert areas of the United Arab Emirates, etc. The survey answered the question of why the drought And deserts, answering the question of why greening in deserts and arid areas must be addressed.The main measure to prevent desertification in arid areas is tree planting, and the prerequisite for tree planting is water conservation.