Union Environment and Forest minister Prakash Javadekar today said urban forests are the lungs of cities, acting as Oxygen banks and carbon sinks. <br />''<br />''Inaugurating a unique urban forest at the office of the CAG of India, Mr Javadekar said the urban forest with 12000 seedlings of 59 indigenous species will act as a role model for offices in Delhi. <br />''<br />''He said the Miyawaki method of forest creation is used which could help in reducing the temperature by as much as 14 degrees and increase the moisture by more than 40 per cent. <br />