Live Science: China's Great Green Wall: The giant artificial forest designed to slow the expansion of 2 deserts
Since 1978, China has planted more than 66 billion trees along its 2,800-mile-long northern border, and it wants to plant 34 billion more over the next 25 years to complete its "Great Green Wall." ...
China's Great Green Wall: The giant artificial forest designed to slow the expansion of 2 deserts