totaly Silver is very expensive compared to other elements such as iron or steel, and is the most expensive after gold.
View page
they are more rare than other elements
View page
These elements are:
- radioactive
- dangerous
- rare
- expensive
View page
Yes, but you need exceptionally expensive and complex nuclear
installations.
View page
Cheap fertilizer is not good and good fertilizer is not cheap.
So, chemical fertilisers are expensive because they contain
nitrogen, phosphorus and potassium elements.