Events
& Issues
New Delhi, 13 June 2018
India’s Polluted Cities
WILL NCAP CLEAN THE AIR?
By Dhurjati Mukherjee
Air pollution levels
remain dangerously high in many parts of the world. New data from WHO shows
that 9 out of 10 people breathe air containing high levels of pollutants.
Updated estimations reveal an alarming death toll of 7 million people every
year caused by ambient (outdoor) and household air pollution.
Coming to India, the
latest global air quality database shows that India has 14 worst-polluted
cities in the world and this point to widespread air pollution that has spread
into second tier cities. The 2018 air quality database released in May pointed
to Kanpur as the world’s most polluted city followed by Lucknow, Varanasi,
Gaya, Patna, Delhi, Agra, Muzzaffarpur, Srinagar, Gurgaon, Jaipiur, Patiala and
Jodhpur.
The 14 cities are at
the top of a list of about 540 cities worldwide where air pollution exceeds the
limits of 20 microns and 10 micro-grams per cubic metre for PM sized 2.5
microns. The database found a site in Kuwait, Ulaanbaattar in Mongolia and four
Chinese cities that follow the 14 Indian cities
Kolkata is at the
40th position with poorer air quality than Baghdad (41) and Beijing (42).
Hyderabad, Mumbai, Nagpur, Pune, Thiruvanthapuram and Vizag are among the other
Indian cities where PM 10 and PM 2.5 levels exceed the prescribed limits.
In an associated
report, the WHO said that the Southeast region bears the highest burden of
about 2.4 million deaths of the estimated seven million premature deaths linked
to air pollution world-wide. Air pollution accounts for an estimated 24 per
cent of adult deaths from heart disease, 25 per cent from stroke, 43 per cent
from chronic obstructive pulmonary disease and 29 per cent from lung cancer.
The Union Environment
Ministry announced the draft National Clean Air Programme (NCAP) that proposes
to enhance air pollution monitoring facilities from 691 to 1000 towns,
determine sources of air pollution in over 94 cities and outline 42 measures
that large cities could take to curb air pollution. Experts have pointed out in
discussions with the government that the plan is silent about actions needed on
the ground and pollution mitigation targets.
The overt focus on
cities gives a misleading impression that bad air is a problem in cities alone.
A more regional approach is needed. The draft NCAP has also tried to underplay
multiple studies that have highlighted the health impacts of air pollution. It
is difficult to agree with the draft that international studies on mortality
die to air pollution exposure “may not be realistic”.
Air pollution is the
fifth leading cause of death in India after high blood pressure, indoor air
pollution, tobacco smoking and poor nutrition with about 62000 premature deaths
occurring from such pollution related diseases. The main sources of such outdoor
pollution are vehicle emissions, thermal power plants, industrial and
agricultural emissions and indoor heating and cooking, the IARC pointed out.
This has been increasing very rapidly in India and the country had the worst
air quality, according to various studies, including one conducted by Yale
University (in 2013). Amongst 132 countries assessed, Kolkata and Delhi are
among the world’s worst polluted cities and hence have the highest levels of
premature deaths.
A few years back, the
Delhi-based Centre for Science & Environment (CSE), analyzed air quality
data collected by the government from 227 cities and towns, and found that
nearly half the country’s urban population is exposed to air with particulate
matter levels higher than safe limits. Thus premature deaths were the highest
in metro cities of Kolkata and Delhi with new lung cancer cases among men being
the highest in these two cities – 16.8 and 13.9 per one lakh population
respectively, according to ICMR. Chennai and Bangalore followed with 12.6 and
10.8 while that of women it was Kolkata 5, Bangalore 4.6, Delhi 4.2 and Chennai
4.2 per one lakh population.
Doctors blame fine
pollutants spewed through automobile exhaust pipes and measuring less than 2.5
micron in diameter for the spurt in lung cancer cases. Obviously those residing
in pavements, squatter settlements and refugee colonies are the worst-affected
and this population is quite large in Kolkata.
Thus the poorer
sections living in these areas, have been mostly affected with cardiovascular
and other diseases, including asthma, bronchitis and lung cancer, which have
witnessed a significant rise over the years. Oxides of sulphur and nitrogen
cause breathing problems while carbon monoxide hampers oxygen transport in the
body. In the lungs, oxygen gets attached to the haemoglobin present in the
blood. When carbon monoxide is inhaled, it combines with haemoglobin to form
carboxy-haemoglobin. As a result, less haemoglobin is available for
transporting oxygen. This causes headaches and, in extreme cases, death.
In the rural sector,
indoor air pollution, resulting from chulhas burning wood, coal and animal dung
as fuel has been another big problem, claiming 5 lakh lives in India every
year, most of whom are women and children. India accounts for 80 per cent of
the 600,000 premature deaths that occur in South East Asia annually due to
exposure to indoor air pollution. Nearly 70 per cent of rural households do not
even have proper ventilation.
Children suffer most
if they breathe polluted air for their lungs are still in a developing phase.
Experts at the Institute of Pulmocare and Research, Kolkata, stated that it has
been seen that proximity to pollution increases the chances of lung disorders
and reduces the efficiency of the organs. The growth in the number of vehicles
in Kolkata – as also in other metros – has resulted in the number of children
with lung disorders increasing. But this is also true for other cities like
Delhi, Mumbai, Bangalore, Chennai etc.
A recent study conducted
by Duke University, US and published in the journal Nature Climate Change,
found premature deaths from air pollution among 154 cities globally may be
controlled if the world cuts greenhouse gas emissions to limit global
temperature rise to 1.50 C above pre-industrial levels. It listed Calcutta,
Delhi, Patna, Mumbai and Agra among the 10 cities expected to see the most
significant health gains, measured by the number of lives saved.
In spite of this
threatening scenario, the initiative of the government is no doubt welcome but
the Plan should not be just techno-centric but a realistic one encompassing
both urban and rural areas. However, focus has obviously to be given on the
polluted cities and more specifically on areas where air quality is very poor–
for example places where waste of the city is being dumped. As regards semi-urban
areas where mining operations are in operation, there is need for
intervention.
The task is indeed
quite challenging and coordination between the Centre and States, on the one
hand, and between air pollution control boards and district officials, on the
other would be needed. Also experts on public health and chemical engineering,
environmental sciences along with institutions like the Institute of Public
Health Engineering (IPHE), All India Institute of Hygiene & Public Health
should be involved to finalise the NCAP and the implementation plan in this
regard.
Meanwhile, at the
global level, the Breathe Life Air Pollution Campaign has been initiated which
is a partnership of WHO, UN Environment and Climate and Clean Air Coalition to
Reduce Short-lived Climate Pollutants to increase awareness and action on air
pollution by governments and individuals.—INFA
(Copyright, India
News & Feature Alliance)
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