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Black carbon emissions from traffic contribute substantially to air pollution in Nairobi, Kenya

Environmental Studies and Forestry

Black carbon emissions from traffic contribute substantially to air pollution in Nairobi, Kenya

L. Kirago, M. J. Gatari, et al.

In Nairobi, researchers Leonardo Kirago, Michael J. Gatari, Örjan Gustafsson, and August Andersson reveal a concerning trend: air pollution exceeding WHO guidelines due to fine particulate aerosols and black carbon, primarily from traffic emissions. Discover how this study highlights the impact of urban growth on air quality and public health.

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Playback language: English
Abstract
Rapid urbanization and population growth in Sub-Saharan Africa are driving increased air pollution, with significant health consequences. This study analyzes fine particulate aerosol concentrations and the radiocarbon composition of black carbon (BC) in Nairobi, Kenya, over a year. Results show that particle concentrations consistently exceed World Health Organization guidelines, with organics and sulfates being major contributors. A high BC fraction (15 ± 4%) suggests BC is a prominent pollutant. Radiocarbon analysis reveals that fossil fuel combustion, primarily from traffic, is the dominant source of BC (85 ± 3%), highlighting its role as a key air quality stressor in Nairobi.
Publisher
Communications Earth & Environment
Published On
Apr 01, 2022
Authors
Leonard Kirago, Michael J. Gatari, Örjan Gustafsson, August Andersson
Tags
air pollution
Nairobi
black carbon
fine particulate aerosols
urbanization
fossil fuel combustion
health consequences

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