The gains in life expectancy by ambient PM2.5 pollution reductions in localities in Nigeria

Etchie, Tunde O. and Etchie, Ayotunde T. and Adewuyi, G.O and Pillarisetti, Ajay and Sivanesan, Saravanadevi and Krishnamurthi, Kannan and Arora, Narendra K. (2018) The gains in life expectancy by ambient PM2.5 pollution reductions in localities in Nigeria. Environmental Pollution, 236. pp. 146-157.

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Global burden of disease estimates reveal that people in Nigeria are living shorter lifespan than the regional or global average life expectancy. Ambient air pollution is a top risk factor responsible for the reduced longevity. But, the magnitude of the loss or the gains in longevity accruing from the pollution reductions, which are capable of driving mitigation interventions in Nigeria, remain unknown. Thus, we estimate the loss, and the gains in longevity resulting from ambient PM2.5 pollution reductions at the local sub-national level using life table approach. Surface average PM2.5 concentration datasets covering Nigeria with spatial resolution of ~1 km were obtained from the global gridded concentration fields, and combined with ~1 km gridded population of the world (GPWv4), and global administrative unit layers (GAUL) for territorial boundaries classification. We estimate the loss or gains in longevity using population-weighted average pollution level and baseline mortality data for cardiopulmonary disease and lung cancer in adults ≥ 25 years and for respiratory infection in children under 5. As at 2015, there are six “highly polluted”, thirty “polluted” and one “moderately polluted” States in Nigeria. People residing in these States lose ~3.8-4.0, 3.0-3.6 and 2.7 years of life expectancy, respectively, due to the pollution exposure. But, assuming interventions achieve global air quality guideline of 10 µg/m3, longevity would increase by 2.6-2.9, 1.9-2.5 and 1.6 years for people in the State-categories, respectively. The longevity gains are indeed high, but to achieve them, mitigation interventions should target emission sources having the highest population exposures.

Item Type: Article
Uncontrolled Keywords: longevity; disability adjusted-life years (DALYs); aging, hazard and survival analyses, disease burden.
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Depositing User: Dr Tunde Ogbemi Etchie
Date Deposited: 30 Nov 2018 16:56
Last Modified: 30 Nov 2018 16:56

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