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 _    _      ___     _    _     _____     _____   
| || | ||   / _ \\  | \  / ||  |  ___||  |__  //  
| || | ||  | / \ || |  \/  ||  | ||__      / //   
| \\_/ ||  | \_/ || | .  . ||  | ||__     / //__  
 \____//    \___//  |_|\/|_||  |_____||  /_____|| 
  `---`     `---`   `-`  `-`   `-----`   `-----`

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Text this: Energy and material flows of megacities