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

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
Air Pollution, News
- in Air Pollution, News
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Satellite Study Finds Rising Levels Of Hidden Air Pollutants In Indian CitiesSatellite observations can help in formulating successful air quality policies, according to experts
Highlights
  • Observations from satellite instruments that scan global skies were studied
  • Rise is PM2.5 and NO2 reflect increasing vehicle ownership: Study
  • Kanpur was ranked by the WHO in 2018 as the most polluted city in the world

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

17,91,56,496Cases
5,81,68,051Active
11,71,06,212Recovered
38,82,233Deaths
Coronavirus has spread to 193 countries. The total confirmed cases worldwide are 17,91,56,496 and 38,82,233 have died; 5,81,68,051 are active cases and 11,71,06,212 have recovered as on June 23, 2021 at 3:45 am.

India

3,00,28,709 50,848Cases
6,43,19419,327Active
2,89,94,855 68,817Recovered
3,90,660 1,358Deaths
In India, there are 3,00,28,709 confirmed cases including 3,90,660 deaths. The number of active cases is 6,43,194 and 2,89,94,855 have recovered as on June 23, 2021 at 2:30 am.

State Details

State Cases Active Recovered Deaths
Maharashtra

59,87,521 8,470

1,26,468 1,055

57,42,258 9,043

1,18,795 482

Kerala

28,29,460 12,617

1,00,881 746

27,16,284 11,730

12,295 141

Karnataka

28,15,029 3,709

1,18,615 4,541

26,62,250 8,111

34,164 139

Tamil Nadu

24,36,819 6,895

56,886 4,443

23,48,353 11,144

31,580 194

Andhra Pradesh

18,57,352 4,169

53,880 4,260

17,91,056 8,376

12,416 53

Uttar Pradesh

17,04,678 202

3,910 253

16,78,486 397

22,282 58

West Bengal

14,85,438 1,852

22,508 232

14,45,493 2,037

17,437 47

Delhi

14,32,778 397

1,918 78

14,05,927 467

24,933 8

Chhattisgarh

9,91,653 482

8,007 557

9,70,244 1,032

13,402 7

Rajasthan

9,51,393 137

2,388 303

9,40,101 437

8,904 3

Odisha

8,83,490 2,957

30,859 1,240

8,48,960 4,159

3,671 38

Gujarat

8,22,620 135

5,159 480

8,07,424 612

10,037 3

Madhya Pradesh

7,89,415 65

1,707 273

7,78,902 318

8,806 20

Haryana

7,67,726 146

2,200 137

7,56,231 263

9,295 20

Bihar

7,20,207 268

2,811 206

7,07,833 468

9,563 6

Telangana

6,15,574 1,175

16,640 606

5,95,348 1,771

3,586 10

Punjab

5,93,063 405

5,968 509

5,71,207 880

15,888 34

Assam

4,88,179 2,869

32,975 350

4,50,924 2,482

4,280 37

Jharkhand

3,44,775 110

1,417 72

3,38,256 180

5,102 2

Uttarakhand

3,38,978 171

2,896 68

3,29,030 231

7,052 8

Jammu And Kashmir

3,12,584 428

7,181 578

3,01,134 999

4,269 7

Himachal Pradesh

2,00,791 188

2,276 132

1,95,062 315

3,453 5

Goa

1,64,957 303

2,920 146

1,59,029 438

3,008 11

Puducherry

1,15,364 284

3,214 150

1,10,423 433

1,727 1

Manipur

64,993 575

9,214 84

54,714 649

1,065 10

Tripura

63,140 395

3,747 163

58,735 554

658 4

Chandigarh

61,467 23

278 33

60,383 56

806

Meghalaya

45,976 421

4,273 77

40,915 341

788 3

Arunachal Pradesh

33,664 289

2,548 9

30,956 279

160 1

Nagaland

24,438 64

1,757 87

22,204 149

477 2

Ladakh

19,871 33

360 5

19,309 38

202

Sikkim

19,458 137

2,430 18

16,732 152

296 3

Mizoram

18,409 430

4,424 197

13,900 233

85

Dadra And Nagar Haveli

10,520 4

61 1

10,455 3

4

Lakshadweep

9,504 33

315 4

9,142 36

47 1

Andaman And Nicobar Islands

7,425 10

103 6

7,195 4

127

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