Evidence on surfaces
Activist pavement stencil drawing attention to air pollution in one of central London's busiest roads, near Euston station.
ULEZ stands for Ultra-Low Emission Zone, an area which now covers the entire inner London, and where vehicles have to pay a fixed daily fee if they don't meet certain emission standards.
Evidence from surfaces
Learning from walls in the Italian village of Bussana Vecchia - a self-built artist commune on the ruins of a medieval Italian village.
This place was destroyed by an earthquake in the 1880s and had been abandoned until a few local and international hippies moved in and started rebuilding, to make it into an artist commune.
The historical narrative is that…