China tests giant air cleaner to combat smog
China tests giant air cleaner to combat smog
- A 60-metre-high chimney stands among a sea of high-rise buildings in one of China's most polluted cities. But instead of adding to Xian's smog, this chimney is helping to clear the air. The outdoor air-purifying system, powered by the Sun, filters out noxious particles and billows clean air into the skies.
- A 60-metre-high chimney stands among a sea of high-rise buildings in one of China's most polluted cities. But instead of adding to Xian's smog, this chimney is helping to clear the air. The outdoor air-purifying system, powered by the Sun, filters out noxious particles and billows clean air into the skies.