Your CO2 emissions are a result of using your smartphone on a daily basis.  Smartphones work on various rare earth minerals such as Gold, Cobalt, Lithium, silver, and silicon. The mining of these components releases carbon into the atmosphere. Similarly, the manufacturing of the smartphone also causes emissions. As a user of smartphones, we also rely on our 4G/5G networks to make calls, surf the internet, use various applications, and occasionally send texts. These networks consume electricity to power up and function. Electricity often comes from non-renewable sources and causes emissions as well. Similarly, our phones need to be charged which again consumes electricity and causes emissions. All these sources combined lead to CO2 emissions that can be attributed to us as users.