They seldom meet on the cricket or football fields, but the world's small island developing states are informally competing with each other to be the first to ditch fossil fuels and embrace clean energy.

A new United Nations analysis of the most recent energy plans of 52 low lying poor countries - traditionally heavily dependent on imports of petrol and oil - shows the Caribbean island of Dominica leading the world with plans to become carbon "negative" by 2020. The Maldives is not far behind, hoping to be carbon neutral by 2020. Tuvalu and the Cook islands intend to generate all their electricity from renewables by 2020 and Timor-Leste, the poorest country in Asia, expects to provide solar electricity to all its 100,000 families by 2030.