أرسل هذا في رسالة قصيرة: The Impact of Innovation on Environmental Quality: Evidence for the Non-linear Relationship of Patents and CO2 Emissions in China

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