Allow me a succinct grumble about the precautionary principle. A recent Guardian item on trade talks post-Brexit refers ia to proponents of Brexit wanting to use future trade talks eg with the US, to ditch the precautionary principle. It states the proponents’ strategy ‘also advocates tearing up the EU’s “precautionary principle”, under which traders have to prove something is safe before it is sold, rather than waiting for it to be proved unsafe’.
Reversing the burden of proof (also known as the ‘no data no market rule’) is not a necessary prerequisite of the precautionary principle. If it were, public authorities’ task in regulating health, safety and the environment would look very different than it does today, as would the regulation of new technologies such as nano or synthetic biology (indeed even AI). Only in specific sectors, has the burden of proof been reversed. This includes, in the EU, REACH – the flagship Regulation on chemicals. In others, it was discussed (e.g. in the reform of the EU’s cosmetics Directive into a Regulation), but eventually dismissed.
Neither does the EU’s approach to the precautionary principle imply ‘when in doubt, opt out’, or ‘when in doubt, don’t do it’. One need only refer to the recent decision to extend the licence for glyphosate to show that the EU does not ban what is not proven safe (the least one can say about glyphosate is that its health and environmental safety is not clearly established). I blame Cass Sunstein’s Laws of Fear, superbly reviewed (critically) by Liz Fisher in the 2006 Modern Law Review for misrepresenting the principle – such that even its proponents often misunderstand its true meaning.
Precaution is not an alternative to science. It is a consequence of science.
EU environmental law (with Leonie Reins), Edward Elgar, soft cover edition 2018, p.28 ff.