Scientists at the University of Manchester have found a surprising global warming culprit – sandwiches. In the first study of its kind, the researchers carried out an in-depth audit of various sandwiches throughout their life cycles and found the triangular meals could be responsible for the equivalent annual carbon emissions of 8.6 million cars in Britain alone.
What the researchers found was that not all sandwiches are created equal and that some varieties have larger carbon footprints than others. The highest footprint was found in premade, prepackaged, all-day-breakfast sandwiches. These contain eggs, bacon, and sausage and are kept packaged and refrigerated until sold and eaten.
By contrast, the smallest footprint is that of a homemade ham and cheese sandwich. Overall, making your sandwiches at home potentially halves the carbon emissions compared to their prepackaged equivalents.
What the researchers found was that not all sandwiches are created equal and that some varieties have larger carbon footprints than others. The highest footprint was found in premade, prepackaged, all-day-breakfast sandwiches. These contain eggs, bacon, and sausage and are kept packaged and refrigerated until sold and eaten.
By contrast, the smallest footprint is that of a homemade ham and cheese sandwich. Overall, making your sandwiches at home potentially halves the carbon emissions compared to their prepackaged equivalents.