CNN and NASA's Landsat department have released a series of amazing satellite pictures showing the dramatic growth of urban areas around the world in the past 30 years. The two superimposed images above show Las Vegas in 1984 and 2011. Click and drag the green cursor on the image to see the changes before and after. See how what used to be barren desert is now lush suburban lawns. Also note how Lake Mead has dramatically shrunk in the same period of time... Las Vegas grew from 520,000 people in 1986 to 1.9 million in 2011.
Below is a view of Tehran, Iran in 1985 and 2009. The population of the Tehran metropolitan area has grown from 3 million people in 1966 to more than 13 million people today.
The UN predicts that the world population will reach 9.2 billion in 2050, and that 70% of that population will be living in cities. The population today is 7 billion.
Here is another one that I made of my old neighborhood in Chula Vista, a suburb of San Diego. The pictures are from 1994 and 2010. In 2001 I used to go mountain biking in those hills, now it's all built up! They built a freeway, three large shopping malls, a movie megaplex, a business park, three high schools and thousands of houses. A whole city sprung up from the ground in ten years!
Here is another one that I made of my old neighborhood in Chula Vista, a suburb of San Diego. The pictures are from 1994 and 2010. In 2001 I used to go mountain biking in those hills, now it's all built up! They built a freeway, three large shopping malls, a movie megaplex, a business park, three high schools and thousands of houses. A whole city sprung up from the ground in ten years!
Here is a close-up of the Chula Vista image showing the old Otay Ranch and what it has become:
CNN has more of these satellite pictures, including views of Dubai, Santiago (Chile) and Shenzhen in China.
[CNN.com-road-to-rio]
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