The following images are from Wikimedia Commons and are changed.
The authors and licences are:

Shanghai CN.png: Desmarais CC-BY-SA-2.0

Berlin DE.png: Juergen Matern CC-BY-SA-3.0

Paris FR.png: Benh LIEU SONG CC-BY-SA-3.0

London UK.png: M(e)ister Eiskalt CC-BY-SA-3.0

New York US.png: Cadiomals CC-BY-SA-3.0

Renewables-Now Inc. Switzerland