Carbon neutrality refers to net-zero carbon emissions. It can be achieved by reducing carbon emissions or increasing carbon adsorption. The popularity of social media including Twitter, YouTube, and LinkedIn provides good channels for sharing relevant information and promoting sustainable carbon-neutral living styles. For example, a motor company has launched social media challenges with Korean pop stars to raise awareness of carbon neutrality. Social media provides real-time information. In Jakarta, flood-related tweet intensity during a flood peaked at about 900 tweets a minute during the floods of 2015. The tweets created real-time maps that people sent a minute before. Regarding government policies, identification of problem areas is needed to help policymakers to resolve problems. Machine learning can monitor these events by studying past records to know how countries and governments performed in a high-risk event or environmental crisis and this data can be used to provide future recommendations to governments for policy making. Additionally, AI can analyze online unstructured data, and predict various scenarios of carbon emissions and adsorptions using structured data. The world of social media is a huge data source still yet to be fully optimized in science.