Yves Cochet is a former Minister of Land Use Planning and the Environment (July 2001 –May 2002). He is currently a Paris Member of Parliament for the Green Party and President of the Left Democrat and Republican Group at the National Assembly. Following his studies in Mathematics, he worked as a teacher and researcher at the National Institute of Applied Sciences in Rennes in 1969. In June 1971, he received a PhD in Mathematics after successfully defending his thesis on formal languages. In the 1980s his research focused on the neural network theory. He has been an ecology campaigner for forty years, and has participated in anti-nuclear protests and delivered many lectures on energy, climate disturbance and degrowth. He has also published Quelle transformation de la société ? (with Jean-Christophe Cambadélis and Gilbert Wassermann, Éditions de l'Atelier, 1995), Stratégie et et moyens de développement de l'efficacité énergétique et des sources d'énergie renouvelable en France (La Documentation française, 2000), Sauver la terre (with Agnès Sinaï, Fayard, 2003), Pétrole apocalypse (Fayard, 2005) and Antimanuel d'écologie (Bréal, 2009).
The Collapse : catabolic or catastrophic ?