The Active City

अपनी भाषा में प्लॉट जोड़ेंBy 2050, the world's population is expected to reach 9.7 billion and more than 70% will live in a big city. Cities must get prepared for the changes that have already begun. They will face t... सभी पढ़ेंBy 2050, the world's population is expected to reach 9.7 billion and more than 70% will live in a big city. Cities must get prepared for the changes that have already begun. They will face the biggest challenge of the 21st Century.By 2050, the world's population is expected to reach 9.7 billion and more than 70% will live in a big city. Cities must get prepared for the changes that have already begun. They will face the biggest challenge of the 21st Century.