Semiconductor silicon is made using coal

I lost a job because of it. That's all I can say as you don't know whose watching. (internet)

I have found another job and I'm happy there, I'm hoping to change jobs with in the company, more pay.

Hexavalent chromium is banned because it is a hazardous substance. It was used to passivate aluminium, and gave it a yellowish finish. The end product contains absolutely no hexavalent chromium, and therefore, it is the manufacturing process that is considered hazardous, because hexavalent chromium is a pollutant.

Is the manufacturing process of semiconductor grade silicon also hazardous? The burning of coal with quartz at over 1100C in a "blast furnace" must emit plenty of pollutants, mustn't it? The burning of coal is toxic! Too toxic to burn at a much lower temperature to generate steam, but somehow OK to chemically react with quartz at far higher temperatures - first liberating the killer carbon monoxide gas, which is used in enrichment to semiconductor grade, turning it into CO2.

Virtually everybody on planet earth living above the poverty line, has at least one item containing semiconductor grade silicon. How much coal has been burned to produce the average persons silicon load? Multiply that by the number of people who own anything containing semiconductors. And when the product goes faulty, we replace it, or we're forced in some circumstances to buy a mobile phone even if we don't want one, or we are frozen out of online transactions for example, or entry to a venue due to Covid19 for another example. Kids are encouraged to live their lives in virtual reality, courtesy of silicon!

The solar farms, the solar grade silicon for hectares of solar panels to prevent the use of ??? Fossil fuels - such as coal - made using coal.

Coal is needed for semiconductors and solar panels. Being a finite substance, it's use for energy generation might use it all up - then we're stuck! Why not explain the truth?

You can make glass out of sand, for valves, although you still need a furnace of some sort. You also need the metals and the pinch of barium used to burn up all the remaining oxygen (can you see its little cup? you can see the "silvering" it leaves behind). You also need plenty of copper and iron for the essential peripherals of power transformer, power choke and output transformer (and wiring - and contacts etc.). The production of such metals uses fossil fuels. With iron it's coke (from coal - not the drug or drink), and limestone, not forgetting iron ore. Similar setup for copper (except it isn't iron). They taught this kind of stuff in geography and physics with chemistry, when I was at school (in Yorkshire - a comprehensive). In Engineering Science at the technical college, we learnt about the three laws of thermo-dynamics, to be able to know how and why they work. Surely today's university educated generations are better than this? So why do they know now't?!