<![CDATA[The increasing intensity of industrial activities in East Kalimantan Province has accelerated environmental degradation, particularly through the growth of solid, liquid, and gaseous waste, thereby reinforcing the urgency of implementing sustainable production systems within the frameworks of Green Manufacturing and Industrial Ecology. This study aims to evaluate the effect of green technology adoption in production processes on industrial waste reduction and to examine the strength of its causal relationship at the firm level. The research employs an explanatory quantitative approach with a multiple-case design. Data were collected from eight manufacturing companies in East Kalimantan that have implemented environmentally friendly production technologies for at least two years. Primary data were obtained through structured questionnaires administered to production and environmental managers, complemented by secondary data on waste volumes before and after technology adoption. Data analysis was conducted using paired sample t-tests and linear regression to determine statistical significance and the strength of the relationship between variables. The findings reveal a statistically significant reduction in industrial waste following the implementation of green technologies, with an average decrease of 23.7%, and a positive regression coefficient indicating that higher levels of green technology adoption are associated with greater waste reduction. Theoretically, this study strengthens the integration of Green Manufacturing principles and Industrial Ecology perspectives at the organizational level. Practically, it provides empirical evidence to support regional industries in designing effective strategies to enhance environmental performance through technological transformation]]>
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