The Global Sustainable Energy Islands Initiative (GSEII), a consortium of international NGOs and multi-lateral institutions, has been organized to support the members of the Alliance of Small Island States (AOSIS), potential private investors and donors by bringing renewable energy and energy efficiency projects, models, and concepts together in sustainable energy plans for small island nations. The GSEII seeks to showcase national efforts to significantly reduce greenhouse gas emissions.

While Small Island Developing States (SIDS) produce only a tiny fraction of global greenhouse gas emissions, many, because of their location barely above sea level, are among the most vulnerable to the effects of climate change such as sea level rise and extreme weather conditions. Compounding their climate change challenge, small island nations struggle with expensive fossil fuel imports and an inability to supply electricity in rural areas. However, these nations are especially suited to utilize combinations of modern renewable energy technologies and energy efficiency due to the availability of renewable energy resources and current energy consumption patterns.