**5. Conclusions**

In summary, with the implement of Life cycle analysis (LCA) methodology for the Malaysian rubber industry in this study, it can be concluded that the reduction in the utilization of ammonium sulfate fertilizer to its optimum level has the potential to reduce the GHGs emission for the cultivation of rubber trees in Malaysia from cradle to grave perspective. Meanwhile, the reduction in the immaturity rubber stage period and incorporating of manual weeding method in the weed management have the potential to reduce the GHGs emission for the production of mature rubber trees for gate to gate boundary in Malaysia.

The GHGs emission from the production of SMR block rubber in Malaysia for the average period of 1 year for cradle to gate boundary have the potential to be reduce through increasing the supply of local natural rubber and making sure the natural rubbers are free or have a very minimum amount of contaminants. The GHGs emission from the production SMR block rubber in Malaysia for the average period of 1 year for cradle to gate boundary also has the potential to be reduce through replacing the current effluent treatment system to a fully aerobic system. This study is hoped to be a part of the continuous effort in meeting sustainability goal in the Malaysian rubber industry and stringent environmental market regulations worldwide.
