Journal
SCIENCE
Volume 335, Issue 6065, Pages 183-189Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1210026
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Funding
- UNEP
- World Meteorlogical Organization (WMO), NASA
- Clean Air Task Force
- Medical Research Council [G0801056B] Funding Source: researchfish
- Natural Environment Research Council [ceh010023] Funding Source: researchfish
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [1016496] Funding Source: National Science Foundation
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Tropospheric ozone and black carbon (BC) contribute to both degraded air quality and global warming. We considered similar to 400 emission control measures to reduce these pollutants by using current technology and experience. We identified 14 measures targeting methane and BC emissions that reduce projected global mean warming similar to 0.5 degrees C by 2050. This strategy avoids 0.7 to 4.7 million annual premature deaths from outdoor air pollution and increases annual crop yields by 30 to 135 million metric tons due to ozone reductions in 2030 and beyond. Benefits of methane emissions reductions are valued at $700 to $5000 per metric ton, which is well above typical marginal abatement costs ( less than $250). The selected controls target different sources and influence climate on shorter time scales than those of carbon dioxide-reduction measures. Implementing both substantially reduces the risks of crossing the 2 degrees C threshold.
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