It is estimated that the adaptation costs to developing countries could rise to as much as $300 billion a year by 2030.
ऐसा अनुमान है कि विकासशील देशों के लिये अनुकूलन लागत, वर्ष 2030 तक बढ़कर 300 अरब डॉलर प्रतिवर्ष तक हो जाएगी.