Next, LCS suggested the framework for technology transfer promotion of the form to unify efforts about climate change mitigation in Japan and abroad under one scheme in the“ Concept of Technology-based Integrated Contribution Approach and Technology Cooperation Scheme to Other Countries against Climate Change,” in April, 2014.
　In this paper, taking the photovoltaic （PV） power generation as an example to estimate the reduction potential in overseas, the impact of the specific effects when it is assumed technical cooperation to other countries by the Integrated Contribution Approach, was also evaluated from the economic aspects. Socioeconomic reduction potential amount by installation of PV systems of 2030 technology level was estimated 350Mt-CO₂/yr in the whole developing countries, which is equivalent to 4% of the estimated CO₂ emissions amount 10Gt-CO₂/yr by electricity generation. On the other hand, the technological potential of CO₂ reductions by PV in developing countries in 2030 was approximately 9 times of the estimated world CO₂ emissions amount. There is a big gap between socio-economic potential and technological potential. Important points for diffusion and wide spread of PV systemic use are: power generation cost reduction by technology development and innovation; development and utilization of energy storage; improved management techniques for long-term use up to lifetime, and promotion of business level installation by use of low interest rate loan.