Using the information and data in Table 1 and 2 to calculate the monthly methane emissions at Mine 1 and 2 . Assume methane recovered is negligible and methane conversion factor equal to be equal to 0.67Gg/106m3 Table 1: Coal production from Mine 1 and 2 Mine12CoaltypeminedAnthraciteBituminousCalorificValue(MJ/kg)3423MiningmethodUndergroundSurface Table 2: Default emission factors for Tier 1 Type of mining Emission factor (m3CH4/ tonne) Underground 25 Surface 2.0 2