Pollution from the Indo-Gangetic Plains (IGP) frequently travels upward, severely degrading air quality in the ecologically sensitive Himalayan mountain ranges. Driven by wind patterns and massive biomass burning, these transboundary plumes carry fine particulate matter , black carbon, and even airborne pathogens, negatively impacting the region's climate and public health.

Pollution from the Indo-Gangetic Plains (IGP) frequently travels upward, severely degrading air quality in the ecologically sensitive Himalayan mountain ranges. Driven by wind patterns and massive biomass burning, these transboundary plumes carry fine particulate matter , black carbon, and even airborne pathogens, negatively impacting the region's climate and public health. 
Key Transport Mechanisms and Trajectories
Western Sector:-
 Atmospheric pollution originating from Punjab and Haryana travels towards the Western Himalayas, bringing agricultural residue burning and vehicular emissions into the mountains. 
Eastern and Central Sector: -
Emissions from Bihar, southern West Bengal, and Bangladesh are the primary drivers of pollution in the Eastern and Central Himalayas. 
Microbial and Dust Transport: -
Powerful desert dust storms from Western India travel eastward across the densely populated IGP before settling on high-altitude Himalayan hilltops. These dust clouds often carry airborne bacteria and pathogens associated with respiratory and skin diseases. 
The Driving Forces
Biomass Burning: -
Much of the growing pollution burden in the eastern IGP and subsequently transported to the Himalayas is driven by widespread rural biomass burning and crop residue burning. 
Transboundary Emissions: -
A long-term aerosol study (2000–2024) by the Kolkata-based Bose Institute indicates that PM pollution rose by more than 20% across the IGP and Himalayan foothills, and these Himalayan-bound emissions remain outside the scope of most localized clean-air interventions. 
Environmental Impact
When these pollutants (particularly black carbon) reach the Himalayan cryosphere, they settle on snow and glaciers. This decreases the surface's albedo (reflectivity), accelerating snowmelt, modifying local weather patterns, and threatening regional water security. 
The specific health effects of airborne pathogens on high-altitude Himalayan populations.
MJF Lion ER YK Sharma 

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