Global pollution is an increasingly alarming and increasing problem, which is why some of the most industrialized countries that are primarily responsible for this environmental condition are trying to run for cover. In the north of China, a large purifying tower has recently been constructed, capable of bringing back the smog of the surrounding area to acceptable levels. The construction is still in an experimental phase and is part of an even wider and more ambitious project ...
The world's largest air purifier was built in Xian in northern China. The tower, about 100 meters high, has improved the air quality in this capital of the Chinese province, which fights against very serious levels of smog every year. The construction of this impressive purifier is part of a research project of the Institute for the Terrestrial Environment at the Chinese Academy of Sciences. Experts have estimated an effective improvement of the air in an area of about 10 square kilometers in the city, with about 10 million cubic meters of air produced per day since the tower is active.
The system works thanks to the greenhouses that are at the base of the structure and large when half the football field, which absorb the polluted air. The stored air is then heated by solar energy and passes through several cleaning filters and then released. In the cold winter months in the city of Xian critical pollution levels are reached, this is due to the urban heating systems still fueled by coal. Even in these circumstances, the purifying tower was able to bring the smog back to contained levels, effectively improving air quality.
In these more polluted periods the levels of fine dust most damaging to human health (PM 2.5), decreased by about 15%. The data collected in this first period of activity are still preliminary, the purifying tower is part of an experiment launched in 2015 to improve the air quality in an artificial and economic way in the main Chinese cities.
The original project as described in a patent application dating back to 2014, envisaged a much larger tower with 500 meters in height and 200 meters in width, with greenhouses covering an area of about 30 square kilometers. The team of researchers of the Chinese Academy of Sciences hopes to build at the end of this first experimental phase, other towers able to reduce the pollution levels of an entire small city: a beautiful project that relaunches China in the fight against pollution global!