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350 Chinese Cities Get Better Air Quality

In the first three quarters of this year, 7 out of 20 cities with the worst air quality were in northern Shanxi province

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Officials told CNN that the Chinese military did not intercept the US aircraft during their mission.
South China Sea, Pixabay

More than half of China’s cities saw air quality improve year-on-year in September, the Chinese Environment Ministry has said.

The average density of PM 2.5 stood at 25 micrograms per cubic meter in September in 338 cities, down 16.7 per cent from the same period last year, according to the Ministry of Ecology and Environment.

These cities enjoyed good air quality on 90.8 per cent of the days last month, up 2.6 per cent, Xinhua news agency said.

Air Quality
Air pollution can also damage your kidneys. wikimedia commons

The world’s most populous nation has over 600 cities and is grappling with chronic pollution which kills about one million people annually.

China is the world’s biggest coal producer and alone burns half of it, leading to severe pollution. The country is also the largest greenhouse gas emitter in the world.

However, the government has cracked down heavily on the polluting industries, shutting many of them. In July, the government released a three-year action plan to tackle the problem.

It also punishes top officials for not doing enough to rein in pollution.

Beijing is no longer the world’s most polluted city.

Air quality

Air quality
Buildings are seen on a hazy day in Xiangyang, Hubei province, China. VOA.

In the Beijing-Tianjin-Hebei region, the share of days with good air quality in September stood at 79.2 per cent, a year-on-year increase of 27.8 percentage points, while the PM 2.5 density of the region dropped by 33.3 per cent on year to 36 micrograms per cubic meter, the Ministry was quoted by Xinhua as saying.

In the first three quarters of this year, 7 out of 20 cities with the worst air quality were in northern Shanxi province, China’s coal-producing hub.

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According to the action plan released in July, by 2020, emissions of sulfur dioxide and nitrogen oxide should have dropped by more than 15 per cent over the 2015 levels, while cities that fail to meet the requirement of PM 2.5 density should see a decline of more than 18 per cent from 2015 levels. (IANS)

Next Story

Here’s How Fish Sticks Can Generate Greenhouse Gas Emissions

Shipping has a massive influence on climate and a shift to cleaner fuels will diminish the cooling effect from sulfur oxides and increase the climate impact

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A study found that Alaskan pollock is a relatively fuel-efficient fishery: Pollock are caught in large nets called midwater trawls that are towed behind boats, hauling in a lot of fish in each landing and reducing the climate impact of the fishing process. Pixabay

Researchers have found that transforming ‘Alaskan pollock’ into fish sticks, imitation crab and fish fillets generates nearly twice the greenhouse gas emissions produced by fishing itself.

Post-catch processing generates nearly twice the emissions produced by fishing itself, which is typically where the analysis of the climate impact of seafood ends, according to the findings, published in the journal Elementa: Science of the Anthropocene.

“The food system is a significant source of global greenhouse gas emissions, and Alaskan pollock is one of the biggest fisheries in the world,” said study researcher Brandi McKuin from Unviersity of California in the US.

“These findings highlight the need to take a comprehensive approach to analysing the climate impacts of the food sector,” McKuin added. “Alaskan pollock is sold as fillets and trim pieces that are used to make products like fish sticks and imitation crab, it’s a huge market,” she said.

Unlike previous studies that have largely overlooked the downstream processing activities associated with Alaskan pollock, this study examined all the components of the supply chain, from fishing through the retail display case.

The results identify “hot spots” where the seafood industry could concentrate its efforts to reduce its climate impacts, said the researchers. For the findings, the research team analysed the climate impacts of transoceanic shipping of exported seafood products.

They found that Alaskan pollock is a relatively fuel-efficient fishery: Pollock are caught in large nets called midwater trawls that are towed behind boats, hauling in a lot of fish in each landing and reducing the climate impact of the fishing process.

After the catch, Alaskan pollock are shipped for processing, and in some cases, transported on large container ships that burn copious amounts of fuel, including cheaper, poor-quality bunker fuel that produces high levels of sulfur particles. The researchers noted that sulfur oxides from ship fuels have a climate-cooling effect.

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Post-catch processing of fish generates nearly twice the emissions produced by fishing itself, which is typically where the analysis of the climate impact of seafood ends, according to the findings, published in the journal Elementa: Science of the Anthropocene. Pixabay

“Seafood products that are exported have a lower climate impact than domestic seafood products,” she said, adding that the climate impacts of shipping will change this year as new regulations for cleaner marine fuels take effect.

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“Shipping has a massive influence on climate and a shift to cleaner fuels will diminish the cooling effect from sulfur oxides and increase the climate impact of products that undergo transoceanic shipping, including seafood,” said McKuin. (IANS)