Innovation in green technology has become an essential approach to the reduction of carbon emissions and the promotion of the adoption of renewable energy. The global economy is in the process of transitioning to sustainable and cost-effective energy systems, where technological innovation is facilitating the reduction of fossil fuel dependency and the enhancement of renewable energy production. The analysis is grounded in key theoretical frameworks, particularly the Induced Innovation Theory, which helps explain how environmental pressures and economic incentives drive technological change. The paper compares the methodologies employed across empirical studies to assess how different approaches capture the dynamics between innovation and environmental outcomes. It also highlights the variations in variable selection, proxies for green innovation, and treatment of endogeneity across research. The paper concludes by proposing a more integrated theoretical-methodological framework to guide future research in Emerging Asian Economies.