Sao Tome and Principe
"AOSIS is a coalition of 44 small island and low-lying coastal developing states, including five observers. As a voice for the vulnerable, its mandate is more than amplifying marginalised voices as it also advocates for these countries’ interests. In terms of size, AOSIS closely resembles the countries it represents on the global stage, but often punches far above its weight, negotiating historic global commitments to cut greenhouse gas emissions, among other achievements.
To achieve its goals, AOSIS often draws on partnerships, including with the United Nations Development Programme (UNDP) and the European Commission ... "