Beijing Air Pollution Mystery Could Be Solved, Scientists Say
More than one million people die each year in China from particulate matter air pollution, but despite 15 years and billions of dollars of efforts to clean up the country's air, dangerous winter smog persists.
Now, an international team of scientists think they have discovered the reason why: The instruments used to measure Beijing's particulate matter pollution were misinterpreting their readings.
"Our research points towards ways that can more quickly clean up air pollution. It could help save millions of lives and guide billions of dollars of investment in air pollution reductions," said Jonathan M. Moch, first paper author and graduate student at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), in a Harvard press release.
In the past, instruments had picked up on the high level of sulfur compounds and read them as sulfates. The Chinese government therefore focused on reducing sulfur dioxide pollution from coal burning power plants. But while the government was successful in those efforts, the overall air pollution levels did not decrease as expected.
That is because, as the team of researchers from Harvard, Tsinghua University and the Harbin Institute of Technology revealed in Geophysical Research Letters Thursday, a lot of those sulfur compounds were actually hydroxymethane sulfonate (HMS)—a compound formed when sulfur dioxide reacts with formaldehyde in smog or fog. The type of instruments used to measure particulate matter in Beijing can easily confuse the two.
The researchers ran a computer model and found that HMS compounds could make up a lot of the particulate matter found in China's persistent winter smog.
"By including this overlooked chemistry in air quality models, we can explain why the number of wintertime extremely polluted days in Beijing did not improve between 2013 and January 2017 despite major success in reducing sulfur dioxide," Moch said.
Moch also said the findings explained why the government's efforts finally seemed to pay off last winter—sulfur dioxide fell below formaldehyde for the first time, so less HMS was formed.
"We think there could have been a shorter way if they had gone straight at formaldehyde," Moch told The Boston Globe.
Major sources of formaldehyde pollution in Eastern China include emissions from vehicles and chemical or oil refineries, so the researchers recommend that China now work on reducing pollution from these sources.
The research team now plans to directly measure HMS levels in Beijing using altered instruments and to use models to assess the importance of HMS formation to pollution across China.
Pollution Sources in China Increased More Than 50 Percent in Eight Years https://t.co/zo7IUGnVIG @Greenpeace @ScienceNewsOrg— EcoWatch (@EcoWatch)1522455004.0
- Trump Insider Embeds Climate Denial Into Agency Reports ... ›
- Climate Denier Is Named to Leadership Role at NOAA - EcoWatch ›
EcoWatch Daily Newsletter
New Jersey is one step closer to passing what environmental advocates say is the strongest anti-plastic legislation in the nation.
Did you know that nearly 30% of adults do, or will, suffer from a sleep condition at some point in their life? Anyone who has experienced disruptions in their sleep is familiar with the havoc that it can wreak on your body and mind. Lack of sleep, for one, can lead to anxiety and lethargy in the short-term. In the long-term, sleep deprivation can lead to obesity, diabetes, and cardiovascular disease.
Fortunately, there are proven natural supplements that can reduce insomnia and improve quality sleep for the better. CBD oil, in particular, has been scientifically proven to promote relaxing and fulfilling sleep. Best of all, CBD is non-addictive, widely available, and affordable for just about everyone to enjoy. For these very reasons, we have put together a comprehensive guide on the best CBD oil for sleep. Our goal is to provide objective, transparent information about CBD products so you are an informed buyer.
The House of Representatives passed a sweeping bill to boost clean energy while phasing out the use of coolants in air conditioners and refrigerators that are known pollutants and contribute to the climate crisis, as the AP reported.
- Renewable Energy Could Power the World by 2050 - EcoWatch ›
- Net Zero U.S. by 2050? House Dems Unveil Sweeping Climate ... ›
- Delayed Senate Energy Bill Promotes LNG Exports, 'Clean Coal ... ›
By Governor Jay Inslee
Climate Week this year coincides with clear skies in Washington state for the first time in almost two weeks.
In just a few days in early September, Washington state saw enough acres burned – more than 600,000 – to reach our second-worst fire season on record. Our worst fire season came only five years ago. Wildfires aren't new to the west, but their scope and danger today is unlike anything firefighters have seen. People up and down the West Coast – young and old, in rural areas and in cities – were choking on smoke for days on end, trapped in their homes.
Fires like these are becoming the norm, not the exception.