China has an air pollution problem. But recently the country has worked to improve its air quality and reduce emissions. In 2017, China elected to shut down 40 percent of its factories, and announced plans to ban diesel-powered cars. In 2018, it became home to the world’s largest smog tower that is capable of reducing nearby air pollution by 15 percent.
Now, China is proceeding with a new plan: planting trees — 84,000 square kilometers (32,400 square miles) of them, to be exact.
