In a recent study conducted by researchers at the Indian Institute of Technology (IIT) in Delhi, it has been revealed that the air quality in major cities of India has shown significant improvement during the nationwide lockdown imposed in response to the COVID-19 pandemic. The study, which focused on cities like Delhi, Mumbai, Bangalore, and Chennai, found that the levels of harmful pollutants such as PM2.5 and PM10 decreased by up to 50% during the lockdown period. This improvement in air quality can be attributed to the reduction in vehicular emissions and industrial activities due to the restrictions imposed to curb the spread of the virus. The researchers also noted that the visibility in these cities improved significantly, indicating a reduction in air pollution. With the easing of lockdown restrictions and the resumption of economic activities, there is a concern that the air quality may deteriorate once again. However, the study highlights the importance of adopting sustainable practices and policies to ensure a cleaner environment in the long term. It is crucial for policymakers to take note of these findings and implement measures to control pollution levels in order to protect public health and the environment. The study underscores the need for continued monitoring of air quality and the implementation of stringent regulations to combat pollution in Indian cities.