This review shows improved air quality by reducing key pollutants in major cities, indicating a need for sustainable control strategies.
Key Points
Lockdowns significantly reduced key pollutants like nitrogen dioxide and particulate matter in major cities, enhancing air quality.
Studies indicated that while emissions dropped due to the lockdowns, ground-level ozone levels paradoxically increased in various locations.
Meteorological factors such as temperature and wind direction played a crucial role in shaping air quality during the lockdown periods.
The temporary improvements in air quality during lockdowns were not sustained post-restrictions, underscoring the need for effective pollution control strategies.