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Satellite Study Finds Rising Levels Of Hidden Air Pollutants In Indian Cities

According to a new study, there has been an increase in the air pollutant formaldehyde in Delhi, Kanpur and London

Satellite Study Finds Rising Levels Of Hidden Air Pollutants In Indian Cities

London: A UK based study published in the journal Atmospheric Chemistry and Physics, found that hidden air pollutants like fine particles- PM2.5 and nitrogen dioxide (NO2), both hazardous to health, are increasing in Indian cities. According to scientists using observations from instruments on satellites that scan the global skies every day, Kanpur and Delhi are the top cities of India where the air pollutants are spreading rapidly. Researchers used a long record of data gathered by space-based instruments to estimate trends in a range of air pollutants for 2005 to 2018, timed to coincide with well-established air quality policies in the UK and rapid development in India.

Also Read: Vehicle Scrappage Policy: Is India On The Right Track To Ensure Clean Air For All?

The study was led by the University of Birmingham and UCL and included an international team of contributors from Belgium, India, Jamaica and the UK. Delhi is a fast-growing megacity and Kanpur was ranked by the WHO in 2018 as the most polluted city in the world.

The researchers speculated that increases in PM2.5 and NO2 in India reflect increasing vehicle ownership, industrialisation and the limited effect of air pollution policies to date. This contrasts with trends in the UK cities London and Birmingham, which show modest but ongoing declines in PM2.5 and NOx, reflecting the success of policies targeting sources that emit these pollutants.

They also found increases in the air pollutant formaldehyde in Delhi, Kanpur and London. Formaldehyde is a marker for emissions of volatile organic compounds that include a large contribution from vehicle emissions in India, and, in the UK, an increasing contribution from personal care and cleaning products and a range of other household sources.

Also Read: Delhi Has Taken More Air Pollution Control Measures Than Any Other City But There Is Still A Long Way Ahead: CSE Report

Karn Vohra, study lead author and PhD student at the University of Birmingham, commented,

We wanted to demonstrate the utility of satellite observations to monitor city-wide air pollution in the UK where ground-based measurements are in abundance and in India where they are not. Our approach will be able to provide useful information about air quality trends in cities with limited surface monitoring capabilities. This is critical as the WHO estimates that outdoor air pollution causes 4.2 million deaths a year.

Study co-author Professor William Bloss, also from the University of Birmingham, commented,

We were surprised to see the increase in formaldehyde above Delhi, Kanpur and London – a clue that emissions of other volatile organic compounds may be changing, potentially driven by economic development and changes in domestic behaviour. Our results emphasise the need to monitor our air for the unexpected, and the importance of ongoing enforcement of measures for cleaner air.

“There is more than a decade of freely available observations from instruments in space to monitor and assess air quality in cities throughout the world. Greater use of these in the UK, India, and beyond is paramount to successful air quality policies”, stated Dr Eloise Marais, Earth observation expert at UCL and conceptual lead of the study.

Also Read: Government Has Taken Number Of Steps To Bring Down Pollution In Delhi: Union Environment Minister

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

NDTV – Dettol Banega Swasth India campaign is an extension of the five-year-old Banega Swachh India initiative helmed by Campaign Ambassador Amitabh Bachchan. It aims to spread awareness about critical health issues facing the country. In wake of the current COVID-19 pandemic, the need for WASH (WaterSanitation and Hygiene) is reaffirmed as handwashing is one of the ways to prevent Coronavirus infection and other diseases. The campaign highlights the importance of nutrition and healthcare for women and children to prevent maternal and child mortality, fight malnutrition, stunting, wasting, anaemia and disease prevention through vaccines. Importance of programmes like Public Distribution System (PDS), Mid-day Meal Scheme, POSHAN Abhiyan and the role of Aganwadis and ASHA workers are also covered. Only a Swachh or clean India where toilets are used and open defecation free (ODF) status achieved as part of the Swachh Bharat Abhiyan launched by Prime Minister Narendra Modi in 2014, can eradicate diseases like diahorrea and become a Swasth or healthy India. The campaign will continue to cover issues like air pollutionwaste managementplastic banmanual scavenging and sanitation workers and menstrual hygiene

World

22,81,49,892Cases
19,07,93,163Active
3,26,71,167Recovered
46,85,562Deaths
Coronavirus has spread to 195 countries. The total confirmed cases worldwide are 22,81,49,892 and 46,85,562 have died; 19,07,93,163 are active cases and 3,26,71,167 have recovered as on September 19, 2021 at 3:52 am.

India

3,34,48,163 30,773Cases
3,32,1588,481Active
3,26,71,167 38,945Recovered
4,44,838 309Deaths
In India, there are 3,34,48,163 confirmed cases including 4,44,838 deaths. The number of active cases is 3,32,158 and 3,26,71,167 have recovered as on September 19, 2021 at 2:30 am.

State Details

State Cases Active Recovered Deaths
Maharashtra

65,18,502 3,391

51,472 530

63,28,561 3,841

1,38,469 80

Kerala

44,88,813 19,325

1,81,411 8,084

42,83,963 27,266

23,439 143

Karnataka

29,67,083 889

15,783 205

29,13,713 1,080

37,587 14

Tamil Nadu

26,43,683 1,653

16,893 50

25,91,480 1,581

35,310 22

Andhra Pradesh

20,37,353 1,174

14,653 144

20,08,639 1,309

14,061 9

Uttar Pradesh

17,09,652 9

193 2

16,86,572 7

22,887

West Bengal

15,61,014 728

7,967 41

15,34,406 757

18,641 12

Delhi

14,38,469 41

404 3

14,12,980 44

25,085

Odisha

10,19,621 695

5,929 689

10,05,564

8,128 6

Chhattisgarh

10,05,042 28

332 14

9,91,150 42

13,560

Rajasthan

9,54,246 8

102 2

9,45,190 10

8,954

Gujarat

8,25,715 13

143 11

8,15,490 24

10,082

Madhya Pradesh

7,92,386 6

97 12

7,81,772 18

10,517

Haryana

7,70,711 6

323 0

7,60,580 6

9,808

Bihar

7,25,881 10

65 0

7,16,158 10

9,658

Telangana

6,63,281 255

5,148 75

6,54,230 329

3,903 1

Punjab

6,01,236 30

316 7

5,84,453 23

16,467

Assam

5,97,709 365

5,063 102

5,86,856 465

5,790 2

Jharkhand

3,48,114 3

74 20

3,42,907 23

5,133

Uttarakhand

3,43,376 21

282 0

3,35,704 20

7,390 1

Jammu And Kashmir

3,27,773 152

1,479 39

3,21,878 113

4,416

Himachal Pradesh

2,16,813 174

1,610 30

2,11,554 142

3,649 2

Goa

1,75,414 123

771 40

1,71,351 81

3,292 2

Puducherry

1,25,384 128

924 5

1,22,631 122

1,829 1

Manipur

1,18,261 140

2,180 92

1,14,251 228

1,830 4

Tripura

83,840 31

367 37

82,665 67

808 1

Meghalaya

79,325 119

1,876 76

76,075 192

1,374 3

Mizoram

79,171 1,104

14,456 161

64,456 938

259 5

Chandigarh

65,176 4

35 1

64,323 3

818

Arunachal Pradesh

54,060 32

461 44

53,328 76

271

Sikkim

30,893 54

728 28

29,786 82

379

Nagaland

30,840 60

491 20

29,696 39

653 1

Ladakh

20,702

109 0

20,386

207

Dadra And Nagar Haveli

10,670

1 4

10,665 4

4

Lakshadweep

10,356

6 1

10,299 1

51

Andaman And Nicobar Islands

7,598 2

14 0

7,455 2

129

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