That chart is very misleading. It says solar will use many times as much silver as current energy production. However the drawing makes it look like it will use many times as much silver as it would use of aluminum. Actually it will use far more aluminum than silver. Same error applies to every comparison of different materials, whether inside a given energy source or between them.
The text gets it right: "Solar needs much more silver and tin than other energy sources, albeit relatively little by weight". It also states "solar uses aluminum, and a lot of it, more than one gram for each kilowatt hour". Aluminum is a bigger problem for solar than silver, despite the incredibly misleading graphic.
Another strange mistake is that the relative use of stuff is biased by the current fraction being used. An obvious one is that it shows Nuclear power as using about 8x as much uranium as "the current power mix". But that is because the current power mix is about 20% nuclear! If "the current power mix" was 0% nuclear then the uranium circle would be HUGE.
A better graphic would be to show absolute sizes of the materials (to produce a given amount of energy), or perhaps multiply the sizes by the amount of carbon produced to make them.