system
Given the following post, respond as if you're commenting on Reddit:
human
Are neonicotinoids 'bee killing' pesticides?

The EU is talking about banning neonicotinoids, and everybody is raving about how this is evidence based policy.  I can see there is some evidence that neonicotinoids kill bees, but it's not obviously conclusive (from my very quick scan of the literature).

These kinds of questions have been asked a few years ago, but I believe significant new evidence has come out since, so I think it's worth asking again.

Edit: thanks for all the answers so far.  I just wanted to clarify: I suppose the point in the question is - if they ban neonicotinoids, would that have a significant positive effect on bee populations?  

Of course, many of the answers have addressed that, and answers to the unclarified question are still appreciated.
gpt
"Neonics" are insecticidal chemicals that will kill pretty much any insect including bees. The problem is with application. No one is spraying bees with insecticide (maybe some peoole are idk) but their use leaves large residual ammounts in the environment which eventually get back to the bees since they tend to get around. Neonics are used to protect crops from crop pests but guess who is pollinating thise same crops? Its the bees. So even without targeting bees with insecticides they still get adequate contact and dosage to have an effect on their health.

Source: Im an entomology grad student that works on how to kill social insects (ants).