best-available evidence—ie, in formal evidence synthesis.

The courses span a suite of synthesis methods, including systematic review and systematic mapping, stakeholder engagement in evidence synthesis, and evidence synthesis technology.

Because there is no time left for trial and error and since resources for organising a transformation into a carbon‐neutral world are inherently limited, decision‐making on climate solutions needs to be based on the best available evidence.

Evidence synthesis, which collates, appraises, and summarises results from individual studies across an evidence base and makes them available for policy advice, is particularly well organised in the health sciences; a key role is played here by the global knowledge network Cochrane, founded in 1993 and seated in London. T