It is an intelligent software could be planted to any electronic devices with the equipment to perceive things. It could convert the object captured to its estimated carbon consumption. When you are shopping, the price tag, and the “carbon tag” therefore could be seen at the same time. And the data of your purchases would be recorded to synthesize a monthly and annual report of your personal carbon footprint. The software will also create custom shopping and transportation plans based on the user’s previous behavioral patterns, balancing between the cost, personal preferences and need, and the carbon footprint, which could be used as a reference.