As of this writing, the Gobi Desert in northern China/southern Mongolia is about half a million square miles (1.3 million km2) in area.
Yes, that's “as of this writing" — because the Gobi Desert is growing.
Due to something called “desertification," about 1,400 square miles (3,600 km2) of China's otherwise arable land is turned into desert each year, as the Gobi creeps further and further south.
To make matters worse, winds often pick up the sand, blowing it toward the densely populated areas in China, resulting in immense dust storms. (Here's a picture of a car windshield after Beijing's 2006 dust storm season.)
The desert in China is expanding — kinda rapidly, too. Image by Frederic J. Brown/AFP/Getty Images.
But China is fighting back. With trees.
In 2001, the BBC reported on what has been called, colloquially, the "Great Green Wall," a not-so-subtle reference to the Great Wall of China, but this "wall" is being made of trees.
The wall is part of a decades-long afforestation project that began in 1978 but isn't expected to be completed until 2050, and it hopes to ultimately make areas currently too arid for habitation or agriculture into fertile homes to both.
A tree-planting exercise on the edge of the Gobi Desert in 2007. Image by Peter Parks/AFP/Getty Images.
One of the early phases was a forced participation drive — in 1981, China passed a law that required its citizens over the age of 11 to plant three to five trees each year — but in 2003, the country turned toward government works.
The Great Green Wall plan called for the creation of a 2,800 mile-long (4,480 km) belt of trees along the Gobi's border.
As Wired reported a year later, this was no small task:
"To build the wall, the government has launched a two-pronged plan: Use aerial seeding to cover wide swaths of land where the soil is less arid and pay farmers to plant trees and shrubs in areas that require closer attention. A $1.2 billion oversight system, consisting of mapping and land-surveillance databases, will be implemented. The government has also hammered out a dust-monitoring network with Japan and Korea."
A photographer looks out over the trees at the encroaching desert. Image by Peter Parks/AFP/Getty Images.
Whether it's working, though, is another question.
One Chinese news agency, citing the State Forest Administration, reported in 2007 that "more than 20 percent of the lands affected by desertification in the project areas have been harnessed and soil erosion has been put under control in over 40 percent of the areas that used to suffer soil erosion in the past."
And in 2014, the Daily Mail echoed these results, reporting that "a study says the measures are working, despite previous criticism."
However, that same year, the Economist noted that many of the trees are withering in the dry, hot conditions and concluded the opposite.
Finally, there's the middle ground, which the BBC reported in 2011: The afforestation process is working — but it'll take 300 years to reclaim the lands the Gobi has already taken.
Either way, China intends to push forward. Given its original timetable, they have 35 years left to figure it out.
Dan Lewis runs the popular daily newsletter Now I Know ("Learn Something New Every Day, By Email"). To subscribe to his daily email, click here.



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An Irish woman went to the doctor for a routine eye exam. She left with bright neon green eyes.
It's not easy seeing green.
Did she get superpowers?
Going to the eye doctor can be a hassle and a pain. It's not just the routine issues and inconveniences that come along when making a doctor appointment, but sometimes the various devices being used to check your eyes' health feel invasive and uncomfortable. But at least at the end of the appointment, most of us don't look like we're turning into The Incredible Hulk. That wasn't the case for one Irish woman.
Photographer Margerita B. Wargola was just going in for a routine eye exam at the hospital but ended up leaving with her eyes a shocking, bright neon green.
At the doctor's office, the nurse practitioner was prepping Wargola for a test with a machine that Wargola had experienced before. Before the test started, Wargola presumed the nurse had dropped some saline into her eyes, as they were feeling dry. After she blinked, everything went yellow.
Wargola and the nurse initially panicked. Neither knew what was going on as Wargola suddenly had yellow vision and radioactive-looking green eyes. After the initial shock, both realized the issue: the nurse forgot to ask Wargola to remove her contact lenses before putting contrast drops in her eyes for the exam. Wargola and the nurse quickly removed the lenses from her eyes and washed them thoroughly with saline. Fortunately, Wargola's eyes were unharmed. Unfortunately, her contacts were permanently stained and she didn't bring a spare pair.
- YouTube youtube.com
Since she has poor vision, Wargola was forced to drive herself home after the eye exam wearing the neon-green contact lenses that make her look like a member of the Green Lantern Corps. She couldn't help but laugh at her predicament and recorded a video explaining it all on social media. Since then, her video has sparked a couple Reddit threads and collected a bunch of comments on Instagram:
“But the REAL question is: do you now have X-Ray vision?”
“You can just say you're a superhero.”
“I would make a few stops on the way home just to freak some people out!”
“I would have lived it up! Grab a coffee, do grocery shopping, walk around a shopping center.”
“This one would pair well with that girl who ate something with turmeric with her invisalign on and walked around Paris smiling at people with seemingly BRIGHT YELLOW TEETH.”
“I would save those for fancy special occasions! WOW!”
“Every time I'd stop I'd turn slowly and stare at the person in the car next to me.”
“Keep them. Tell people what to do. They’ll do your bidding.”
In a follow-up Instagram video, Wargola showed her followers that she was safe at home with normal eyes, showing that the damaged contact lenses were so stained that they turned the saline solution in her contacts case into a bright Gatorade yellow. She wasn't mad at the nurse and, in fact, plans on keeping the lenses to wear on St. Patrick's Day or some other special occasion.
While no harm was done and a good laugh was had, it's still best for doctors, nurses, and patients alike to double-check and ask or tell if contact lenses are being worn before each eye test. If not, there might be more than ultra-green eyes to worry about.