Here is todays devils panties and wow. Been knocking it out of the park this week to me. Although not really the take here it makes me think about mercury in fish. As a doomer I actually feel that even if global warming was taken away by a genie wish and we 100% did not add carbon going forward we are in real trouble because of pollution. In our planet and in our products. I mean it seems when people talk about the rise of civilization they talk about agriculture growing staple crops, but fishing to me is even larger in importance for civilization. Its been our staple protein for most of history. Then of course we have the use of pesticides causing the increase in arsenic in our staples to. ugh.
That depends on what level you're working at: If you hire a company to do electrical work as a part of your construction project, you'll typically rely on that company to provide paperwork confirming that everything is in order. As your company does not have the qualifications to do the certification (hence why you are hiring a subcontractor), you cannot be expected to cross-check the work.
If the building catches fire due to an electrical failure, it's the subcontractor that signed off on the paper whose held liable, not the company that delivered the end-product.
Similarly, if I buy a product and receive a certificate that it holds some standard, I'm permitted to assume the certificate is valid and re-sell the product, unless there's some express reason I should have understood that something is wrong.