Cuckoos are known to produce some of the worst air pollution in the world, and the air quality in parts of the world they migrate to can be worse than the pollution in some cities.
In China, where most of the birds migrate, many cities are reporting significant pollution problems, according to an analysis of more than 10,000 pollution monitoring data from around the world.
The pollution levels have been rising for years.
The latest analysis shows that China’s pollution levels hit a record high of more that 9,000 micrograms per cubic meter of air pollution per day in March.
This means that one cubic meter can spew nearly 50 microgram of carbon dioxide per hour.
In Beijing, Beijing’s capital, the air pollution levels reached a record 7,000, or 5 times the pollution levels from the first three months of the year.
It’s a serious problem.
The city of 6.4 million people has more than 40 million residents.
Beijing is home to one of the most polluted cities in the region, with more than 6,000 tons of carbon monoxide per cubic kilometer, or about 100 times the daily average.
China has long struggled with air pollution and a lack of air quality control, according for example to the World Health Organization.
But this pollution problem has gotten worse.
Air quality is getting worse in Beijing, the second-largest city in the country.
It is worse than in the previous years, according the WHO’s air quality index, which measures how much pollution there is in a city.
That’s because the city has added more industrial and residential buildings and more cars, all contributing to higher levels of pollution.
People in Beijing are worried that the city is headed into an environmental disaster.
“If they can’t control the pollution, it’s going to be a disaster,” one resident said in a recent video recorded by a local news outlet.
“This is not a normal city anymore.
The air is killing us.
The quality of our city is going to go down, and this is the first time in my life that I’ve ever seen it like this.”
The pollution problem can be attributed to the rapid development of the city.
In the past few years, the city of Beijing has seen a large influx of residential construction, many of which are built in high-rise areas, according a recent study.
This construction is not required by law, but is often done to meet construction deadlines.
China’s construction boom has led to a rapid increase in building construction and pollution.
A city that has been built to serve the needs of the elite, according Toobin, is now being built to meet the needs and lifestyles of the average Chinese person.
Toobin said the city needs to be more environmentally friendly, with a focus on building a “green” future.
“I think the problem is that we’re in a crisis,” he said.
“We need to move away from this kind of city and build a city that is environmentally sustainable.”
The city has a high concentration of high-rises and high-density housing.
It also has a significant concentration of automobiles, and some have been shown to emit more carbon dioxide than the air they are emitting, according Cui.
Cui said the pollution problem is also being caused by a combination of government policies and a shortage of clean water resources.
Beijing has the highest carbon footprint in the Asia-Pacific region.
It has the world’s highest pollution levels in terms of carbon emissions per capita, according an analysis from the Stockholm Environment Institute.
This is a country with a population of more or less 1.2 billion people.
The country has more greenhouse gas emissions per person than almost any other country in the World, according World Bank data.
According to the report, China has the sixth-highest carbon emissions in the OECD and second-highest in the G20.
China also has the second highest number of people living in poverty in the entire world, behind only Brazil.
In a recent report, the United Nations’ Environment Program called the current pollution crisis a “catastrophe” for China and called on China to “step up its efforts to reduce pollution, especially in the cities.”
The report called for Beijing to invest in cleaner air technology, including making the city’s air cleaner and more efficient.
But the city hasn’t done much to address the pollution issue, according several residents.
The residents of Beijing, who have been living in an air-polluted city for decades, are concerned about the effects of pollution on the quality of their daily lives.
“It’s a problem,” one man said.
A man who asked to be identified only as Liu told ABC News he lives in a one-room apartment in the city, and that pollution is “a constant nuisance.”
The air quality problems are causing his health problems.
Liu said he has asthma and chronic bronchitis.
He said the air in his apartment is so dirty that he can’t sleep, and he has had difficulty breathing and