I have been asked by my customer to advise what the carbon footprint of my product is. Unfortunately due to confidentiality I canâ€™t say what the product is, but it includes sheet metal, plastic extrusions, cast iron and other manipulated materials. It will consume electricity throughout its life. I have been asked for this in terms of grams of C02 per unit. This seems like such a vague question to me and I have no idea where to start. Any suggestions?