acids (HCL, HF, Nitric, Chromic, etc.) used in etch and clean operations, photo-resists (ugh), nuetralizing spent acids with NAOH, resultant salts down the old waste water stream to city sanitation, spent cutting oils for wafering, the list goes on and on.
When you tell the enviro-libs about this and other stuff that goes into solar cell manufacturing, their eyes glaze and cranial capacity apparently increases to the point that the cranium cracks the skull and it oozes out.
they also cannot comprehend that hydrocarbons are from decomposed organic matter and are compounds of such matter. Supposedly organic and oil should never be used together in a sentence. Allegedly hydrocarbons and anything made from hydrocarbons does not degrade although microbes consume oil on the bottom of the ocean and I need to buy new tarps every year and the dashboard on my truck is falling apart.