nations step up to fight smog - air purification

Hong Kong: As billions of people in Asia suffocate under polluted skies, authorities have turned to water
Disperse drones and outdoor air purifiers to improve air quality while companies try to make money by selling everything from canned air to the lungs --purifying teas.
According to the United Nations environmental organization, about 92% of the population in the Asia-Pacific region faces air pollution, which poses a significant risk to their health.
Here are some ways people living under smog are trying to limit the effects of smog.
When public anger over toxic air rises, the authorities turn to spray water, which is considered to insist on contaminants and bring them to the ground.
But tools like water cannons have little effect on being criticized and are a "band"
Aid "solutions that distract attention from the root causes.
New Delhi, the world's most polluted major city, tried to sprinkle water over the city by helicopter in 2017, but the helicopter could not fly due to the low visibility caused by smog.
South Korea tried to create artificial rain to solve the problem of air pollution in January, but failed. Earlier, a plane planted clouds with silver iodine produced only a few minutes of foggy rain.
Xi'an, a northern Chinese city, is experimenting with a giant air purifier the size of an industrial chimney that can reduce pm2. 5.
The researchers said the concentration reached 15% within 10 square kilometers.
Hong Kong opened a family this year.
The 7 km tunnel equipped with air purification system is touted as the world's largest tunnel for handling air volume.
4 million of car exhaust per hour.
The government says it will be able to use large fans to remove at least 80% of harmful particles and carbon dioxide, which suck the exhaust gas into air purification plants in three ventilated buildings along the tunnel.
When the air pollution is particularly serious, "smog refugees" often come in winter, and many residents of China's smog cities have fled to cleaner places, for example, the resort in southern China temporarily rested and returned after cleaning up.
China's largest online travel agency, Ctrip, estimates that more than a million residents in smog cities such as Beijing and Shanghai leave China every 2016 to escape the smog.
Popular destinations in these so
Smog refugees include places like Japan, Australia and New Zealand.
Some people are even in the lungs-
Ctrip said: "Clean up travel . "
Although experts say residents in smog cities are unlikely to see the health impact of breathing bottled air, this does not prevent entrepreneurs from selling jars from New Zealand, Canada, Australia, and Switzerland to them.
About $22 (RM89)
Consumers can order a can of 8 liters of Banff Air from Canada's famous tourist attractions or pay $125 (RM509)
A can of air from the English countryside. In China ,"
As a way to clean the lungs, suppliers promote smog tea while Mongolian residents drink "oxygen cocktails "--
Use a machine or air tank to spray oxygen into a juice glass.
The advertisement boasts that "only one oxygen cocktail is equal to three. hour-
Although there is no scientific evidence that they can protect people from pollution, they must walk in dense forests. —