Visual artist Alexandre Orion removes soot in an artful manner to produce skulls in the tunnels of the polluted city of Sao Paulo. Orion does so in an attempt to create intervention, raise awarenes, and decrease pollution. "From the ocular cavities of so many dead, his work looks out on the living and interrogates people passing by; it quietly criticizes our omission, our comfortable acceptance of pollution." ( Jose De Souza Martins)