ＣＮＮが提供するサイトです。世界各地の今と過去の比較。東京は、１９８９年から２０１１年の間に３００万人人口が増えています。
東京のサテライト写真比較
http://edition.cnn.com/SPECIALS/world/road-to-rio/satellite-photos-urban-sprawl/index.html
Japan's notoriously crowded capital grew from 8.3 million in 1989 to over 13 million in 2011, but this snapshot only tells a fraction of the story. During the day, Tokyo's population increases by a further three million people, according to the government, as a result of all those commuting for work.
