Tuesday November 20, 2018

Kejriwal leads ‘Car Free Day’; pollution level drops by 60%

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NewsGram Staff Writer

New Delhi: The city witnessed a 60 per cent drop in the air pollution on the first Car Free Day, said a report released by the Centre for Science and Environment (CSE) on Thursday.

The car-free initiative as well as the low traffic load on Dussehra has helped lower the pollution levels and toxic exposure in the city.

“Today (Thursday), the air particulate matter (PM 2.5) was 265 micrograms per cubic metre (cu m) in comparison to a normal day, when the particulate normally was 689 micrograms per cu m,” said the report released on Thursday evening.

Particulate Matter (PM2.5) is an air pollutant that is a concern for people’s health when its levels in the air are high.

PM2.5 are tiny particles in the air that reduce visibility and cause the air to appear hazy when levels are elevated.

The Delhi Pollution Control Committee too has supported the CSE report and has observed overall drop of 45 percent in PM2.5 level in the city.

The car-free day in Delhi was observed on the stretch between Red Fort and India Gate with Delhi Chief Minister Arvind Kejriwal leading a cycle rally in the morning.

“This initiative of the Delhi government has only helped to prove how the growing car numbers in the city aggravate toxic pollution. If these numbers are controlled, pollution can be lowered significantly,” said Anumita Roychowdhury, executive director (research and advocacy), CSE.

The exposure monitoring on the road was carried out by CSE first on October 21, a regular day, and during the car-free event on Thursday.

Meanwhile, Delhi Chief Minister Arvind Kejriwal took to social media to share the impact of car free day, saying we need to reduce traffic.

In the series of tweets, he said: “Almost 60 percent reduction in pollution noted on that road. It means traffic is main culprit. We have to reduce traffic.”

“Comfortable, reliable, accessible public transport system and better designed roads is the key. I’ll personally work on this,” he added.

(With inputs from IANS)

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Air Pollutants Can Be Stopped If They Are Frozen : Scientists

The air-quality across the NCR was very poor

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Pollution, pollutants, India, air pollution, WHO, diwali
India's Rashtrapati Bhawan, or the Presidential Palace is partly visible due to smog as traffic plies on Rajapth, the ceremonial boulevard in New Delhi. VOA

Freezing pollutants can prevent deadly outdoor air pollution — thought to cause more than three million premature deaths worldwide every year — from seeping indoors by 99 per cent, scientists have discovered.

The research, by a team of scientists from the Nottingham Trent University in the UK and the Chinese Academy of Sciences, involved studying the effectiveness of cryogenics for indoor air purification, by removing the gaseous pollutants and tiny particulates caused by haze.

The team found that as they circulated haze-polluted air through a cryogenic condenser, the finer particles stuck together in the condenser tube before dropping out by gravity, and emerging as clean air.

Air Pollution, China, WHO,Pollution, pollutants
A man wearing a respiratory protection mask walks toward an office building during the smog after a red alert was issued for heavy air pollution in Beijing’s central business district, China. VOA

Their method was able to remove 99 per cent of particulates and 98 per cent of nitrogen oxide pollutants.

“Hazardous outdoor air pollution has severely affected indoor air quality, threatening the health of billions of people,” said Professor Robert Mortimer, Dean of the School of Animal, Rural and Environmental Sciences at Nottingham.

“Outdoor air pollution in cities is a global problem. While there are some existing technologies to purify indoor air, they can be inefficient, expensive or produce harmful by-products.

“When outdoor air quality is poor, people tend to spend even more time indoors – but outdoor pollution also leads to indoor pollution and people are still impacted.”

air pollution, Pollution, pollutants
In this Sept. 19, 2018 photo steam and cooling towers of a lignite power plant are reflected in a pond in Peitz, eastern Germany. VOA

The experiments, reported in the journal Science of the Total Environment, showed that by simply circulating polluted air through a small freezing chamber we can remove most of the fine particles and gas pollutants.

“Our study makes it possible to add an ‘air cleaner’ option to household appliances in areas which might experience extremely poor air conditions. By controlling indoor air pollution and improving air quality in this way, this work could be greatly beneficial for public health,” added Gang Pan, Professor at the varsity.

It is hoped that the work could pave the way for simple modification of air conditioning and humidifier units so that they can also clean polluted indoor air, the team said.

Air Quality, WHO, Pollution, pollutants
Air pollution can also damage your kidneys. wikimedia commons

Delhi and the National Capital Region (NCR) on Sunday witnessed “very poor” air quality with the minimum temperature recorded at 12.4 degrees Celsius, two notches below the season’s average.

Also Read: Delhi’s Air Quality Leads to Ban On Truck And Construction

The air-quality across the NCR was very poor, according to System of Air Quality and Weather Forecasting And Research.

The humidity at 8.30 a.m. was 87 per cent. The maximum temperature was likely to hover around 28 degrees Celsius. (IANS)