The major GHG emissions came from the cultivation stage due to fertilizer utilization, N2O emission from N-fertilizers and the effect from diesel oil for truck transport: fields to starch mills it release emission about CO2, N2O, CH4, etc. from combustion. The second part of the GHG emissions came from the polymerization process (Lactic acid, lactide and PLA resin production) due to energy consumption, including steam and grid electricity. The PLA bottle production and cassava starch production due to CH4 emissions from the wastewater treatment process and release emission from electricity utilization and the energy in the molding process. The less emission came from glucose process because it use less of electricity energy.