BEIJING—While China’s chief climate negotiator is getting rock star treatment at the Durban climate summit this week, his peers back in the capital are suffering a third straight day of foul air.

As a leading Canadian newspaper put it, China provided “the few glimmers of hope at the stalled negotiations” in Durban, where "photographers and television journalists swarmed around the chief Chinese negotiator, Xie Zhenhua, as he entered a news conference on Monday to announce his list of conditions for considering a legally binding treaty on carbon emissions after 2020."

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It seems that despite being the world's biggest carbon emitter, China could be the key to a deal on a legally binding agreement to reduce emissions.

However, not many glimmers of hope could be spotted back home.

A persistent 'fog'
The Chinese state-run print media all ran headline stories Tuesday morning on the persistent "fog" that has blanketed Beijing and parts of the country’s northeast since the weekend. (See video above of the "hazardous" level of smog on Monday).

Much of the coverage focused on the hundreds of flights cancelled at the Beijing Capital International airport—the world’s second busiest hub—or the rising and very vocal concerns about air pollution.  Some local reports referred to sales of air filter masks and air filter machines spiking in the past week.

Still more reports tried to cast the air pollution issue as one of sovereignty.  "The heavy fog or smog that has shrouded Beijing in the past couple of days has triggered a renewed round of debate over the different air pollution standards applied by China and the United States," said an opinion piece in the Global Times, a state-run newspaper with a strong nationalist overtone.

But at least these same newspapers are now calling it "smog" rather than "fog," as they were just a day ago.  The China Daily, another state-run newspaper, ran a headline on page 3 crying, "Exposure to smog is severe hazard."  Later in the day, the paper’s web site posted four stark images of the same location showing changes in air visibility. (See photo above). The images are pretty staggering.

Only 13 days of 'good' air this year so far

And as we write this, the ever-trusty and ever-reliable @BeijingAir Twitter feed has been down five hours, prompting followers to wonder whether the pollution has finally gotten to the air quality index monitor that lives on top of the U.S. Embassy in Beijing.

A sobering analysis of the @BeijingAir feed can be found in this post by China Dialogue, which notes that the improvements in air quality claimed by officials at the Beijing Environmental Protection Bureau "are due to irregularities in the monitoring and reporting of air quality – and not to less polluted air."

Moreover, based on the analysis using the @BeijingAir data, this year there have only been 13 days of "good" air quality. 

Buried further amidst the quantitative data was one more alarming point: "…if Beijing’s fine particulate concentration even reached the polluted levels of Los Angeles, life expectancy may increase by over five years."

We at NBC News Beijing are trying to claw back a few months to our life span.  We have just taken delivery of two air filter machines for the bureau.

By Adrienne Mong and Bo Gu

BEIJING — If there were one place that is living proof that global carbon dioxide emissions in 2010 jumped the largest amount on record, it’s got to be the Middle Kingdom.

Emissions leapt 5.9 per cent last year, according to the Global Carbon Project.

And the world’s biggest emitter —yes, China — was a big contributor.  It pumped 2.2 billion tons of carbon into the air, compared to the 1.5 billion tons of carbon by the U.S.

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On days like Monday — and there have been way too many this year — it feels like Beijing is the receptacle.

'Hazardous' days
We’ve already written about it, but this time returning to the Chinese capital after a break, I found my hardy NBC News colleagues ordering air filter machines for their homes and air filter masks for cycling (to get around the traffic).

Monday, while the @BeijingAir index — which comes from an air quality monitor housed atop the U.S. embassy in Beijing — tweeted hourly “hazardous” readings all day, we took a peek at readings back home to see how levels of air pollution were faring across the Pacific.

Across a map of the United States, it was a depressing monochromatic “green” color signifying “good” quality air — with only a few slashes of “yellow,” meaning “moderate.” 

Bear in mind, according to the chart developed by the U.S. Environmental Protection Agency, “hazardous” is the highest alert level, which would trigger “health warnings of emergency conditions. The entire population is more likely to be affected,” according to the site.

There were no readings from the Beijing Environmental Protection Bureau’s (EPB) own air monitor until mid-afternoon Monday, when it acknowledged “slight pollution.” 

Last month, the Chinese Ministry of Environmental Protection suggested it was finally heeding growing concerns among Beijing residents’ about air pollution.

The ministry said it would begin publishing measurements for the smallest particulate matter or PM2.5, also considered the most dangerous to human health because they’re tiny enough to enter the lungs and cause damage to the respiratory system.

On Thursday, however, the Beijing EPB emphatically announced PM2.5 readings for the city would not be made public.

A 'mirage'
To add insult to health injury, officials have been quoted in local newspapers as saying they will set up a new air monitoring system for Beijing in … Tianjin — a metropolis 80 miles away from the capital.

Mind you, photos posted on the Shanghaiist blogsite suggest we in Beijing are not the only ones suffering.

(There’s been plenty of supporting visual evidence coming out of Beijing all day.  One user of Weibo, the popular Chinese microblog, posted a photo of high-rises apparently floating above a cloud of pollution, calling it a “mirage.”  And YouKu, a Chinese version of YouTube, posted a video of this morning’s commute.)

Soho property mogul Pan Shiyi, who led an online petition to get PM2.5 readings published by the EPB, has begun posting on his Weibo account screen shots from an iPhone app that compiles the U.S. embassy’s BeijingAir index.   

In the meantime, Chinese authorities are still determined to call the smog by any other name.

Flight after flight on the Beijing Capital International airport website was shown to be cancelled — owing to “fog.” A Xinhua news agency report described it as “heavy fog.”

But an AFP report called it “smog,” tallying the airport casualties: 213 domestic and 15 international cancelled flights.

See Shanghaiist for more photos of the smog in Beijing and China

Update: Since this posting, a state-run newspaper, The Global Times, quoted meteorological officials as saying the “dense fog” enveloping Beijing and parts of the northeast will persist until Friday. One official described it as a “normal climate condition in Beijing.” Good thing we got our masks.