The network
Sixty-one cities and regions have pledged. This is all of them.
The list comes from the Coverage Tracker. Beside each place: cells with a registered source, and cells anyone has checked at all, out of the twenty in the Index. The Index has twenty cells. Eight are tracked place by place: the four pillars at city and region scale. The bioregion and planet rows are read once for everyone, and the community row is what a node fills.