Buying things can increase your carbon footprint. Many people buy things that they want, not only things they need and many of them get thrown away adding to the large amount of waste in the world. For example, if a sibling goes with you to the store and although you only need to buy groceries, your sibling finds a toy and asks if they can buy it. The truth behind this situation is that they really do not need the small toy, it will probably never be touched again and end up in the trash. They may try to convince you, but you need to use your best judgement and tell them no.