By the year 2000, life will be difficult to maintain on Earth.

Henri Lefevbre : Theorist
"By the year 2000, whether or not there has been a nuclear war, our water and air will be so polluted that life on earth will be difficult to maintain." Lefebvre's critical analysis of urban society focused on the transformation of the city to complete urbanization, driven by industrialization and spatialization.

Henri Lefevbre, La Révolution urbaine, Paris: Editions Gallimard,1970.