ফেব্রুয়ারী 04, 2014
The air that residents of New Delhi breathe cuts three years off their life spans, says a recent study by Michael Greenstone of the University of Chicago.
The study, involving environmental economists from Harvard and Yale universities as well, says, “Bringing all regions of the country into compliance with air quality norms would increase the life expectancy of the millions of people living in these areas by 3.2 years on average or a total of about 2.1 billion life years.”
The study quotes data from the Central Pollution Control Board (CPCB), which reveals that 77% of Indian cities and towns exceeded national air quality standards for dangerous airborne particles known as PM10 in 2010.
Estimates from the World Health Organisation (WHO) suggest that 13 of the 20 cities in the world with the worst fine particulate (PM2.5) air pollution are in India, including New Delhi, the worst-ranked city. India has the world’s highest rate of death caused by chronic respiratory diseases.
Public apathy, government myopia, climate fallout
Any corrective measure comes up against public apathy, especially the ambition of every resident to buy ever-larger cars that use diesel. Any move to equate the costs of diesel and petrol faces opposition from farmers who use diesel irrigation pumps – a fact used to great effect by car manufacturing lobbies.
As for the government, it continues to advocate the use of coal as the mainstay of power generation in India. The country has increased its coal generation capacity by 73% in the last five years, and current plans are to add another 110 GW of coal power by 2022. Supporters of this policy say it is the only way out, as electricity generated by burning coal is cheaper than by using sunlight or wind. But this does not take into account the cost that individual Indians bear to treat respiratory diseases caused by coal burning. Nor does it take into account the lost productivity as millions of people are unable to go to work due to such diseases. Nor does it take into account the destruction caused by coal mining.
Coal burning is the biggest contributor to India’s greenhouse gas (GHG) emissions. The country is already the world’s third largest emitter of GHGs, which are causing climate change. In this year when an international deal to combat climate change is being negotiated, India is under pressure from the global community to rein in its emissions. But the government is refusing to take any step on the coal burning issue, on the plea that around 300 million Indians who are outside the power grid must get electricity. While that need is irrefutable, using coal power for the purpose is estimated to take global GHG emissions on a steep upward curve, while affecting the health of millions of Indians.
Health affected already
The study says that broad areas of the country, particularly in north India, are well out of compliance with the standard. This non-compliance holds in rural as well as urban areas. Fine particles can travel long distances from where they are originally emitted, imposing health costs on even those people who live far from major sources of pollution.
Rural India also directly faces particulate air pollution from local sources, such as biomass combustion. The study states that over half the population – 660 million people – live in regions that do not meet national air quality standards (40 μg/m3 micrograms per cubic metre) and over 20% of the population live in regions with air pollution levels at more than twice this standard. Nearly every Indian (99.5% of the population) lives in an area with PM2.5 pollution above WHO’s guidelines.
The study finds that Indian cities, with an average PM2.5 concentration of 46.0 μg/m3, are far more polluted than those in Europe (21.7 μg/m3) or the US (9.6 μg/m3), and polluted even in comparison to China, where cities average 40.4 μg/m3. A number of Indian cities have very high fine particulate levels – above 75 μg/m3.
Moreover, Indian national air quality standards are far less stringent than in other countries. “At the current prescription of 40 μg/m3 for annual PM2.5, the Indian standard is four times the WHO guideline and is the least stringent of the four regions,” states the study.
“The loss of more than two billion life years is a substantial price to pay for air pollution. And yet this may still be an underestimate of the costs of air pollution, because we do not account for the impact of other air pollutants, the impacts of particulates on morbidity or labour productivity, as well as preventive health or avoidance costs borne by Indian households,” the study states.
Greenstone says that past studies have shown that environmental improvements in developing countries can lead to longer and healthier lives, which are critical ingredients for economic growth.
In a study released in 2013, Greenstone found that people who live in northern China are set to lose a total of 2.5 billion years of life expectancy compared to those living in the south, due to the extensive use of coal in power boilers for heating north of the Huai River.
“The Government of India has a tremendous opportunity to improve the health of its citizens by reducing air pollution,” Greenstone said. “And we now know that this is feasible because environmental regulations have been shown to work in India when the public demands them. We can also draw from these results that no matter what climate deals are worked out internationally, India seems unlikely to significantly reduce greenhouse gas emissions unless its people consider climate change an urgent issue and strongly call for action.”
US embassy monitors air
On February 18, the US launched a joint air quality programme at select diplomatic missions, including New Delhi. Since real-time air quality data are unavailable in many areas, the State Department and EPA’s collaboration will provide data from these missions to EPA’s AirNow platform. “It also will enhance the availability of ambient air quality data and expertise around the world, offering a greater opportunity for the United States to create partnerships on air quality with other nations,” says the Department of State.
During US President Obama’s visit to India in January, one of the agreements reached was to implement EPA’s AIR Now-International programme and megacities partnerships, focused on disseminating information to help urban dwellers to reduce their exposure to harmful levels of air pollution, and enable urban policy planners to implement corrective strategies to improve air quality. However, any progress in the initiative is yet to be seen.
Agenda to fight air pollution
Recently the New Delhi-based think tank Centre for Science and Environment (CSE) presented an agenda for action to fight air pollution in India’s capital. The agenda was aimed at the Aam Aadmi Party, which was elected to power in Delhi a few weeks ago.
In February 2015, CSE monitored air pollution levels in buses, autos, the metro, and while walking – mainly to assess the level of pollution that average citizens are exposed to on a daily basis while travelling in the city. The CSE analysis showed that SPM exposure in all transport modes is very high. The average levels recorded are 2-4 times higher than the background levels reported by the Delhi Pollution Control Committee.
The CSE study showed pollution levels increase when traffic is stationary at junctions and in traffic jams. In a traffic jam on a stretch close to Paharganj in central Delhi, levels peaked at 1,170 μg/m3.
CSE asked Delhi’s new Chief Minister Arvind Kejriwal to implement pollution emergency measures, improve vehicle emissions standards , tax diesel use and improve public transport, especially last mile connectivity.