333 Schievano , 2014 Chu , 7.1 7.1 50-70 5.14 Khanal, 2008) H 1 2 7.1 2.00 16.00 0.09 0.71 4.00-75.00 5.00-15.00 0.02 0.20 858.00 918.00 2,318.00 2,148.00 CH4