Construction materials and household items are a part of a long-term carbon sink called the 'technosphere'

We know a lot about how much fossil-derived carbon is emitted to the atmosphere but less about how much is stored in human-made products. Ecological economists estimate that each year, humans add around 400 million tons of fossil carbon to long-lasting products such as plastics, buildings, and human infrastructure. Although these products could be considered a 'carbon sink,' proper waste management is essential to prevent them from becoming environmental hazards.