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A Tower of Hope in the Fight Against Air Pollution

A Tower of Hope in the Fight Against Air Pollution

World Largest Air Purifier Helps Solve the Smog Issue

A 300-foot-tall air purification tower seems to be shining a ray of hope through smog-polluted air in the city of Xian, China. The “world’s biggest air purifier” is still in the experimental stages, but if results (due out soon) prove to be good, much larger towers could be built and used in other air-polluted parts of the world too.

Here’s How It Works

  • Polluted air is sucked up into greenhouses surrounding the base of the tower
  • Solar power is used to heat the air
  • As the hot air rises up through the tower, it’s cleaned by multiple layers of filters
  • The cleaner air exits through the top of the tower

Xian China world’s biggest air purifierThe goal of the project, which began in 2015, was to find an effective, low-cost way to remove pollutants from the air. And while the tower’s cost hasn’t been disclosed, it does seem to be very efficient. Said Cao Junji, head of research at the Institute of Earth Environment at the Chinese Academy of Sciences, “It barely requires any power input throughout daylight hours.”

Clearing the Air

Again, the data is preliminary, but it seems to be working. So far, monitoring stations in the area have shown that the fine particulate matter deemed most harmful to health has been reduced by an average of 15% during periods of heavy pollution.

China ranks fifth in the world for deaths caused by air pollution; the problem is especially bad in larger cities like Xian (population 12.9 million). While the experimental tower currently impacts an area of only about 10 square kilometers (3.8 miles), the full-size model (about five times larger) could clean the air of a small city!

Air pollution is now the leading environmental cause of death in the world, so it’s extremely encouraging to know that that towers like this and other technology that cleans the air is in the works.

comment_2Has polluted air impacted your life or that of someone you love? What steps do you take to help ensure the continued availability of clean air? Just drop us a line in the comments below.


Were you aware that air pollution could cause death?

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Rhiannon Schweitzer
Rhiannon Schweitzer
4 years ago

I’m currently living in Seoul, and air quality is a huge issue here. My children have to wear filter masks when they go outside when the AQI is above 100. Now that the weather is finally getting warmer, we were so excited to finally have a lot of outdoor time, but now we are kept inside by poor air quality many days. It’s so sad and disappointing that more is not being done to reduce it to moderate levels. All we do is get emergency warnings and are “encouraged” to take free (only during rush hour) public transportation on those days. Mexico City is building green walls along highways pillars, that’s an awesome start.

Lia Thompson
Lia Thompson
4 years ago

This sounds fantastic. Love that people working towards a better air quality for the future.