claim: In 1905, PDO switched to a warm phase.
evidence: Sopoaga said in his speech to the meeting of heads of state and government: Tuvalu's future at current warming, is already bleak, any further temperature increase will spell the total demise of Tuvalu ... For Small Island Developing States, Least Developed Countries and many others, setting a global temperature goal of below 1.5 degrees Celsius relative to pre-industrial levels is critical.