[xyzzyz]

There are a lot of much more dangerous substances on the planet, and many of them are likely used in the manufacturing process of photovoltaics.

[beat]

Cite?

Have fun with the googling. Feel free to check out the toxicity of plutonium (separate from radiation) while you're at it.

[xyzzyz]

Well, hydrogen cyanide is more dangerous, it is used to produce cyanide salts (potassium and sodium), which are also extremely toxic, and are commonly used in electroplating

[beat]

And is hydrogen cyanide not used in nuclear plant construction?