北方的沙尘暴为什么减少了？因为这群人……

“十年以前这就是沙地，没有什么植被。现在你想看到裸露的沙子，不太容易了。”

华维光是来自内蒙古通辽的一名退休教师，爱好摄影。在他的家乡有着中国最大的沙地，科尔沁沙地。这片沙地横跨三省，是中国北方沙尘暴的主要来源。

十年前，华维光发现家乡周围的沙地来了不少治沙工人，便开始用相机记录。

Hua Weiguang, a retired teacher from Tongliao, Inner Mongolia autonomous region, is a photography enthusiast. A decade ago, he noticed the arrival of tree planters in Horqin and started to take photos of them. His photos are evidence of the remarkable transformation of the land.

图源：华维光

For the workers fighting desertification, hats, scarves and goggles are basic necessities to protect them from the wind and sand.

There was no way to avoid the brutal summer heat. Workers had to lie down on the ground or curl up in the narrow shade of their cars to cool off. They also had to eat their lunch amid the blowing sands, taking in the grit with their food.

"If we don't fool the tree, it won't fool you. You take it seriously, it does reciprocally. You put efforts to make it live, the tree lives up to your expectation," Chao says.

China's forest resources have increased by over 70 million hectares in the past decade, ranking first in the world. One tree after another, a green Great Wall has been built. Brush by brush, a green field has been painted over the yellow sandy land.

出品人：王浩 刘伟玲

监制：柯荣谊

统筹：何娜

制片人：左卓

记者：焦洁 朱迪齐

编导：朱迪齐 焦洁 

脚本：朱迪齐 焦洁

解说：Ryan Carroll Usher

特别鸣谢：华维光

编辑：朱迪齐

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他用超200万张照片，记录了被联合国点赞的“北京奇迹”