According to the satellite data published by US space agency National Aeronautics and Space Administration (NASA) stated that the air pollution over northern India has dropped to a 20-year-low for this time of the year. he data were retrieved by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite.
Report Highlights:
♦ The report highlighted that the sensors observed aerosol levels low after the imposition of a nationwide lockdown in India.
♦ As per the analysis, an optical depth or thickness of less than 0.1 over the entire atmospheric vertical column shows a “clean” condition. If aerosols are concentrated near the surface, an optical depth of 1 or above indicates very “hazy” conditions.
♦ The report tracked the aerosol optical depth (AOD). AOD shows how light is absorbed or reflected by airborne particles as it travels through the atmosphere.
Note: Aerosols are very tiny solid and liquid particles suspended in the air. It reduces visibility and can damage the human lungs and heart.
