Ten questions concerning the future of residential indoor air quality and its environmental justice implications

Building and Environment, Journal Year: 2025, Volume and Issue: unknown, P. 112957 - 112957

Published: April 1, 2025

Language: Английский

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COVID-19 pandemic: What can we learn for better air quality and human health?

Journal of Infection and Public Health, Journal Year: 2021, Volume and Issue: 15(2), P. 187 - 198

Published: Dec. 4, 2021

The COVID-19 lockdown resulted in improved air quality many cities across the world. With objective of what could be new learning from pandemic and subsequent lockdowns for better human health, a critical synthesis available evidence concerning pollution reduction, population at risk natural versus anthropogenic emissions was conducted. Can societal norms adopted during pandemics, such as use face cover, awareness regarding respiratory hand hygiene, physical distancing, help reducing disease burden future? masks will more socially acceptable high episodes lower middle-income countries, which to reduce exposure. Although post-pandemic, some reduction strategies may affected, car-pooling mass transit systems commuting avoid exposure airborne infections like coronavirus. However, promoting non-motorized modes transportation cycling walking within currently being enabled Europe other countries overshadow losses. This demand focus on increasing walkability town all ages populations, including differently-abled community. study highlighted that health sustainability there. is also need promote measures work-from-home, technological infrastructure, extension smart cities, information technology.

Language: Английский

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Long-term health impact of PM2.5 under whole-year COVID-19 lockdown in China

Environmental Pollution, Journal Year: 2021, Volume and Issue: 290, P. 118118 - 118118

Published: Sept. 6, 2021

Language: Английский

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Spatiotemporal impact of COVID-19 on Taiwan air quality in the absence of a lockdown: Influence of urban public transportation use and meteorological conditions

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 365, P. 132893 - 132893

Published: June 27, 2022

Language: Английский

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NO_x and O₃ Trends at U.S. Non‐Attainment Areas for 1995–2020: Influence of COVID‐19 Reductions and Wildland Fires on Policy‐Relevant Concentrations

Journal of Geophysical Research Atmospheres, Journal Year: 2022, Volume and Issue: 127(11)

Published: June 6, 2022

Abstract We analyzed NO 2 and O 3 data from 32 U.S. non‐attainment areas (NAAs) for 1995–2020. Since 1995, all regions have shown steady reductions in the weekend‐weekday pattern indicates that production regime most NAAs has transitioned to a x ‐limited regime, while few remain ‐saturated. In eastern U.S., made progress toward meeting current (70 ppb) standard, but this is less true midwestern western NAAs, with showing little improvement peak concentrations since about 2010. Due COVID‐19 restrictions, were substantially reduced 2020. we see significant both concentrations. results more variable, higher lower values (WUS), variable substantial increases at sites, due influence huge wildland fires. The recent over past decade shows large amount of fires strong on policy‐relevant metric WUS, making it difficult these meet standard.

Language: Английский

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Revisiting Total Particle Number Measurements for Vehicle Exhaust Regulations

Atmosphere, Journal Year: 2022, Volume and Issue: 13(2), P. 155 - 155

Published: Jan. 18, 2022

Road transport significantly contributes to air pollution in cities. Emission regulations have led reduced emissions modern vehicles. Particle are controlled by a particulate matter (PM) mass and solid particle number (SPN) limit. There concerns that the SPN limit does not effectively control all relevant species there instances of semi-volatile order magnitudes higher than emission levels. This overview discusses whether new metric (total particles, i.e., solids volatiles) should be introduced for effective regulation vehicle emissions. Initially, it summarizes recent findings on contribution road concentration levels Then, both total from vehicles presented adverse health effects volatile particles briefly discussed. Finally, open issues regarding an appropriate methodology (sampling instrumentation) achieve representative reproducible results summarized. The main finding this is that, even though sampling quantification feasible, details its realization regulatory context lacking. It important define dilution, measurement instrumentation, sizes, etc.) conduct inter-laboratory exercises determine reproducibility proposed method. also necessary monitor according method understand current possible future With better understanding formation nucleation mode will identify culprits (e.g., fuel, lubricant, combustion, or aftertreatment operation). Then solutions can enforced right decisions taken need initiatives, example addition tailpipe, decrease specific organic precursors, inorganic precursors NH3, SOx), revision fuel lubricant specifications.

Language: Английский

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Long-Term Variation in Carbonaceous Components of PM2.5 from 2012 to 2021 in Delhi

Bulletin of Environmental Contamination and Toxicology, Journal Year: 2022, Volume and Issue: 109(3), P. 502 - 510

Published: March 23, 2022

Language: Английский

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Impact of COVID‐19 Pandemic Lockdown in Ambient Concentrations of Aromatic Volatile Organic Compounds in a Metropolitan City of Western India

Journal of Geophysical Research Atmospheres, Journal Year: 2022, Volume and Issue: 127(6)

Published: March 14, 2022

Abstract The real‐time Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX) concentrations were measured in a metropolitan city of India during January to May 2020 2014‐2015‐2018 assess the impact emission reduction COVID‐19 lockdown. total BTEX (∑BTEX) 11.5 ± 9.0, 15.7 16, 5.3 5.0, 2.9 2.0, 0.93 1.2 ppbv January–May 2020, respectively. evening rush hour peaks lockdown decreased by 4–5 times from same period years 2014‐2015‐2018. A significant decline background suggests regional‐scale anthropogenic emissions. contributions ∑TEX compounds ∑BTEX increased 42% 59% winter 64%–75% under hot summer conditions. While reductions dominated period, meteorological photochemical factors may also have contributed. Meteorological influence on actual observed data was removed normalizing with ventilation coefficient (VC). ambient air 85%–90% VC‐normalized 54%–88% estimated compared those changes using nighttime data, which take into account photooxidation removal, are ∼8% lower than estimates all data. These consistent change people's movement as inferred mobility Although enforced, levels good for quality. study need more effective science‐based policies that consider local regional factors.

Language: Английский

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Global spatiotemporal estimation of daily high-resolution surface carbon monoxide concentrations using Deep Forest

Journal of Cleaner Production, Journal Year: 2022, Volume and Issue: 350, P. 131500 - 131500

Published: March 23, 2022

Language: Английский

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Spatiotemporal variations of tropospheric ozone in Spain (2008–2019)

Environment International, Journal Year: 2023, Volume and Issue: 176, P. 107961 - 107961

Published: May 9, 2023

This study aims to support the development of Spain's Ozone Mitigation Plan by evaluating present-day spatial variation (2015–2019) and trends (2008–2019) for seven ground-level ozone (O3) metrics relevant human/ecosystems exposure regulatory purposes. Results indicate that O3 depends on part distribution being analyzed. Metrics associated with moderate concentrations depict an increasing gradient between northern Mediterranean coasts due climatic factors, while considering upper end distribution, this tends attenuate in favor hotspot regions pointing local/regional formation. A classification atmospheric Spain is proposed based their pollution patterns, identify priority areas (or hotspots) where precursor abatement might significantly reduce during episodes. The assessment reveals a narrowing at national level, influenced lower tending increase over time, those reflecting higher decrease. While most stations show no statistically significant variations, contrasting are evident among hotspots. Madrid area exhibits majority upward across all metrics, frequently highest rates, implying both chronic episodic exposure. Valencian Community mixed pattern, high peak decreasing, downwind Barcelona, Guadalquivir Valley Puertollano shows variations. Sevilla only large Spanish city generalized decreasing trends. different hotspots highlight need mitigation measures be designed scale effective. approach may offer valuable insights other countries developing plans.

Language: Английский

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