The pandemic led to (partial) shutdowns of plants, which does not accurately portray what a normal production is usually like. As such, EPD calculations based on lifecycle data from that year would have been inaccurate. Further, some of the product lifecycle data is calculated by external agencies which only base their calculations on an entire calendar year. Therefore, the EPD's we kicked off mid 2021 or prior are based on data from 2019, and recent ones are based on data from 2021.