The Environment Series[1][2] Heads developed from the Environment Triptych portrait sculptures by Jon Edgar in 2006.
His ongoing series of terracotta clay portraits celebrates those contributing to a sustainable future on Earth.
The sculptor observes the sitter on a rotating chair, working over seven or eight hours building up the head on a wooden peg using small pieces of clay.
[3] One sitter accounted "It is the most intense and prolonged physical scrutiny I have ever had from a friend.
For hours on end.