What are the disadvantages of flux core welding?

Could you elaborate on the potential drawbacks of flux core welding? Are there any specific safety concerns that operators should be aware of? Additionally, does flux core welding tend to produce weaker welds compared to other methods? What about the cost-efficiency of this process? Are there higher material or equipment costs associated with flux core welding? Moreover, does it require more skilled operators to achieve consistent results? Are there any environmental considerations that need to be taken into account, such as the disposal of flux waste? Understanding these disadvantages would help businesses make informed decisions regarding their welding needs.