Reasonless economic activities of human beings, such as over-reclamation, overgrazing, denudation, misuse and gouging, trigger and accelerate land desertification, which are only the exterior causes of land desertification.

• 摘要人类不合理的经济活动，如滥垦、滥牧、滥采、滥伐、滥用等触发并加速了土地荒漠化的进程，但这只是制约土地荒漠化的外在机制。