Before buying anything, did you ever give it a moment's thought, " Do I need this? Or do I want this? ". This simple question, when answered truthfully, can be a contribution to lowering your carbon footprint or just saving money in general. An example would be, the new iPhone 17 just came out, now you have the iPhone 14 or 15, it works completely fine and could probably work fine for another 5-10 years with good care. But due to advertisements and looking at your friends with the new iPhone, you would also want one, do you need it? No. Do you want it to show off and not feel left out? Yes. Buying a new iPhone will completely waste your old one and your new one will  have a heavy cost, maybe not on the person buying it, but on the environment it will. It takes 65 kg of CO2 to make a single iPhone 17. An approximate number of 100 million iPhone 17's were made in 2025. That's about 6.5 trillion kg of CO2. So the next time you buy something, think about it, do you need it because its something you need in you daily life and don't already have, or if it's something you want, because you wish to acquire it.