Former United Nations Educational, Scientific, and Cultural Organization chief Federico Mayor says: “Cities consume enormous amounts of energy, exhaust water supplies, and devour food and materials....
UNESCO endine peadirektor Federico Mayor sõnab: „Linnad tarbivad tohutul hulgal energiat, ammendavad veevarusid ning hävitavad kolossaalses koguses toitu ja mitmesuguseid materjale....