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• Expert technical and economic rationalities overlook political aspects of sustainability. • Local experiences reveal structures and processes that shape inequitable outcomes. • Sustainable developmentality creates a triple-bind for rural mountain residents. • The triple-bind contributes to large numbers migrating from mountain dwellings. • Mountain migration and land abandonment is a political not an inevitable process. Sustainability challenges persist in the central Indian Himalayas (CIH) despite an array of solutions proffered by external experts. This paper interrogates the 'sustainability gaze' of external experts – which reflects attempts to reconcile neoliberal economic growth with environmental conservation within the logics of technical and biophysical rationalities - by exploring local experiences of rapid and uncertain social and environmental change. Three strands of policy and practice shape the gaze: (i) natural hazard mitigation for climate change adaptation; (ii) reducing social vulnerability through pro-poor development; and (iii) increasing resilience through environmental management and conservation. Results challenge narratives that overpopulation causes environmental degradation and changing patterns of migration are a natural process of modernisation in the CIH. Alternative local narratives highlight haphazard and inequitable economic growth, lack of mountain planning and disaster management, inadequate social welfare programmes, and monkey relocation policies as the major sustainability challenges. The paper discusses how the gaze produces 'sustainable developmentality' - a depoliticising process that cultivates multiple and conflicting mountain subjectivities, namely: (i) active community members responsible for mitigating natural hazards, (ii) productive farmers and flexible waged labourers, and (iii) custodians of the environment. This creates a triple-bind for smallholders which has forced huge numbers to migrate from their mountain dwellings with unsustainable outcomes. Exploring local perspectives re-politicises the debate, exposing the contradictions and tensions of the gaze and the broader systemic issues of power and inequity the gaze overlooks. Such insights are crucial for rendering development policies more relevant to mountain residents of the CIH and beyond. [ABSTRACT FROM AUTHOR]

South Asian air pollutants exert substantial effect on the climate and environment change over the Tibetan Plateau (TP). This paper investigates the trans-boundary transport of PM 10 , PM 2.5 , and O 3 from South Asia to the TP via WRF-Chem sensitive analysis. It is found that PM 10 , PM 2.5 , and O 3 over South Asia are mainly sourced from anthropogenic sources. South Asian emissions contribute up to 54% of PM 10 (PM 2.5) in the TP in the pre-monsoon season. For O 3 , the highest contribution of 18.13% is in the monsoon season, while the lowest contribution of 8.67% is in the winter season. To evaluate the respective contributions of anthropogenic and biomass burning emissions in South Asia to PM 10 , PM 2.5 , and O 3 in the TP, anthropogenic and biomass burning emissions in South Asia are considered separately. The results show that the largest percentage contribution of PM 10 (PM 2.5) from South Asian anthropogenic emissions to PM 10 (PM 2.5) in the TP with value of 35.86% (37.77%) occurs in winter, while the lowest percentage contribution of 16.52% (16.77%) appears in the monsoon season. For O 3 , the largest contribution of 17.74% from South Asian anthropogenic emissions appears in the monsoon season, whereas the lowest contribution of 8.59% occurs in winter. Compared to the anthropogenic emissions, the biomass burning emissions in South Asia have a relative less contribution to PM 10 , PM 2.5 , and O 3 in the TP. The largest contribution of PM 10 (PM 2.5) from South Asian biomass burning emissions to PM 10 (PM 2.5) in the TP is 20.04% (18.37%) in the pre-monsoon season. Conversely, the lowest contribution of 0.58% (0.53) appears in the monsoon season. O 3 from South Asian biomass burning emissions contributes <1% to O 3 in the TP in each season, implying that the biomass burning emissions in South Asia have little effect on O 3 in the TP. This study is of great significance to the ecological environment protection for the TP. • Contributions of South Asian emissions to PM 10 , PM 2.5 , and O 3 in the TP are quantified. • Anthropogenic emissions in South Asia have a larger contribution to PM 10 , PM 2.5 , and O 3 in the TP. • O 3 from South Asian biomass burning emissions contributes <1% to O 3 in the Tibetan Plateau. [ABSTRACT FROM AUTHOR]