What’s in a PC?

According to John Vidal, writing in the Guardian, a typical 27kg (60lb) desktop computer contains:

Plastics – 6.26kg
Lead – 1.72kg
Silica – 6.8kg
Aluminium – 3.86kg
Iron – 5.58kg
Copper – 1.91kg
Nickel – 0.23kg
Zinc – 0.6kg
Tin – 0.27kg

Also present are trace amounts of manganese, arsenic, mercury, indium, niobium, yttrium, titanium, cobalt, chromium, cadmium, selenium, beryllium, gold, tantalum, vanadium, europium, and silver.