What is the name of the 'world's biggest air purifier' with a height of over 100 meters, to combat smog and air pollution constructed by China?
Q1. What is the name of the 'world's biggest air purifier' with a height of over 100 meters, to combat smog and air pollution constructed by China?
Answer: Xian smog tower
Explanation: China constructed the Xi'an Smog Tower (also called the Xian air purification tower), standing over 100 metres tall, as an experimental solution to combat severe air pollution through passive air filtration.