These numbers seem suspiciously high. In the paper (from 2011), it estimated that laptops contain 871 grams of steel and 244 grams of epoxy, among other things

These numbers seem suspiciously high. In the paper (from 2011), it estimated that laptops contain 871 grams of steel and 244 grams of epoxy, among other things (the total weight is 2kg more than a modern dell xps). The steel figure is from a teardown so that's believable to me, but definitely out of date. The epoxy is an estimate but seems incredulous to me, even for 2011. Does it really take 30-60 MJ to make a handful of glue?