Cradle to Cradle, remaking the way we make things
William McDonough i Michael Braungart
Radical simplicity, small footprints on earth
Jim Merkel
Cosmos
Carl Sagan
Biomimicry. Innovation inspired by nature
Janine M. Benyus
The ecology of commerce
Paul Hawken
Our ecological footprint
Mathis Wackernagel
William Rees
Natural capitalism
Paul Hawken
Amory Lovins
L. Hunter Lovins
The skeptical environmentalist
Björn Lomberg