Describir: Environmental indicators. Indicateurs d'environnement. Oecd core set. Corps central de l'ocde :

  ______   _    _    _    _    __   __   _    _     _____     ______  
 /_   _// | || | || | || | ||  \ \\/ // | |  | ||  |  ___||  /_____// 
 `-| |,-  | || | || | || | ||   \ ` //  | |/\| ||  | ||__    `____ `  
   | ||   | \\_/ || | \\_/ ||    | ||   |  /\  ||  | ||__    /___//   
   |_||    \____//   \____//     |_||   |_// \_||  |_____||  `__ `    
   `-`'     `---`     `---`      `-`'   `-`   `-`  `-----`   /_//     
                                                             `-`      
   ___    
  / _ \\  
 / //\ \\ 
|  ___  ||
|_||  |_||
`-`   `-`