The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
The UNFCCC[2] and multiple case studies date Samsø reaching 100% renewable, carbon-neutral energy status to 2007.
The UN climate body's own case study dates Samsø becoming carbon-neutral and 100% renewable to 2007.[1]
Independent reporting corroborates the 1997 contest and the 2007 completion of the conversion plan.[1]
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