english: 40 percent of the world's energy is taken up by buildings currently, and 60 percent of the world's population will be living in buildings in cities with a population of over one million in the next 15 years.
non_english: Zgrade trenutno troše 40% svetske energije, a 60% svetske populacije će živeti u zgradama u gradovima, što je populacija od preko milion u narednih 15 godina.