Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Chronic Obstructive Pulmonary Disease-I: Introduction01:20

Chronic Obstructive Pulmonary Disease-I: Introduction

3.3K
Chronic Obstructive Pulmonary Disease (COPD) is a long-lasting respiratory condition requiring continuous attention and care. It is a progressive lung disease that leads to breathing challenges due to airflow obstruction. It manifests as persistent respiratory symptoms and restricted airflow resulting from abnormalities in the airways and alveoli, usually due to long-term exposure to harmful particles or gases. COPD mainly consists of two primary conditions: emphysema and chronic bronchitis.
3.3K
Asthma-I: Introduction01:29

Asthma-I: Introduction

3.1K
Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
3.1K
Physical Principles Governing Gas Exchange01:16

Physical Principles Governing Gas Exchange

2.9K
Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
2.9K
Environmental Applications of Microorganisms01:30

Environmental Applications of Microorganisms

662
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
662
Introduction to Epidemiology01:26

Introduction to Epidemiology

1.4K
Epidemiology, known as the cornerstone of public health, involves studying the distribution and determinants of health-related events in defined populations and applying these insights to control health issues. This is essential for understanding how diseases spread, identifying populations at greater risk, and implementing measures to control or prevent outbreaks. Epidemiology addresses not only infectious diseases but also non-communicable conditions like cancer and cardiovascular disease,...
1.4K
Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

2.4K
Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
2.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Ozone pollution: a persistent challenge in large cities like Mexico City, Los Angeles and Beijing.

UCL open. Environment·2025
Same author

Heterogeneous HONO formation deteriorates the wintertime particulate pollution in the Guanzhong Basin, China.

Environmental pollution (Barking, Essex : 1987)·2022
Same author

A global observational analysis to understand changes in air quality during exceptionally low anthropogenic emission conditions.

Environment international·2021
Same author

General discussion: Trends in emissions concentrations.

Faraday discussions·2021
Same author

Aerosol-photolysis interaction reduces particulate matter during wintertime haze events.

Proceedings of the National Academy of Sciences of the United States of America·2020
Same author

Integrated urban hydrometeorological, climate and environmental services: Concept, methodology and key messages.

Urban climate·2020

Related Experiment Video

Updated: Nov 26, 2025

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters
05:18

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

557

Introductory lecture: air quality in megacities.

Luisa T Molina1

  • 1Molina Center for Energy and the Environment, La Jolla, California 92037, USA. ltmolina@mce2.org.

Faraday Discussions
|December 8, 2020
PubMed
Summary

Megacities face significant air pollution challenges impacting health and climate due to intense urbanization. While progress has been made, understanding complex atmospheric processes and emerging issues remains crucial for improving air quality.

More Related Videos

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
09:33

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India

Published on: December 23, 2022

2.5K
Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions
05:45

Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions

Published on: January 7, 2019

11.7K

Related Experiment Videos

Last Updated: Nov 26, 2025

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters
05:18

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

557
Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
09:33

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India

Published on: December 23, 2022

2.5K
Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions
05:45

Composition and Distribution Analysis of Bioaerosols Under Different Environmental Conditions

Published on: January 7, 2019

11.7K

Area of Science:

  • Environmental Science
  • Atmospheric Chemistry
  • Urban Studies

Background:

  • Urbanization drives megacity growth, leading to severe air pollution with global health and climate impacts.
  • Despite historical progress since major smog events, knowledge gaps persist in atmospheric oxidation, secondary particle formation, and climate change effects.
  • Air quality varies across megacities, with many still experiencing severe pollution, necessitating enhanced regional and international cooperation.

Purpose of the Study:

  • To provide a comprehensive overview of megacity air pollution.
  • To discuss emission sources, atmospheric processes, and air quality management strategies.
  • To examine the health and climate impacts of megacity air pollution, including COVID-19 lockdown effects.

Main Methods:

  • Review of existing literature on megacity air pollution.
  • Analysis of emission sources and atmospheric physicochemical processes.
  • Examination of air quality trends, management, and health/climate impacts.

Main Results:

  • Megacities are major sources of atmospheric pollutants affecting local and regional environments.
  • Complex atmospheric processes, including organic secondary particle formation, require further investigation.
  • Air quality improvements are observed in some megacities, but many challenges remain, exacerbated by factors like climate change and pandemics.

Conclusions:

  • Continued research into atmospheric chemistry and emerging pollutants is vital for megacity air quality.
  • Effective air quality management requires integrated strategies and international collaboration.
  • Addressing megacity air pollution is essential for public health, environmental protection, and climate change mitigation.