6. Conclusions
In this research, based on a carbon footprint involving economic and environmental attributes, a supplier selection mechanism was proposed to reduce the harm to the environment. We proposed a novel way to determine the strategies for environmental attributes. The profits of the participants strongly depended on both the economic and environmental attributes, which promotes the participants to preferably select the greener suppliers. This research provided not only an evaluation and selection mechanism, but also an effective incentive selection model which urges the participants initiatively improve their strategies. On the other hand, three supplier determination models are proposed for different purposes. Participants can choose models according to their own preferences on profits, green factors, and CO2 emissions. It was verified that Model 2 has the best performance on increasing the green factors, and Model 3 has the best performance on reducing CO2 emissions. Moreover, it is verified that the proposed models urge the agents to improve their strategies after several iterations. The proposed models can be applied into the e-commerce (online shopping) when the products are free shipping. The supervisor of the market platform can force consumers to select suppliers with the shortest distance and highest green factor, and force suppliers to supply greener products by adopting the proposed model.