> increase the share of eco-farming, i.e. conventional farming without the chemistry. The problem: both approaches drastically reduce agricultural productivity.

A prime example, the seed-dressing used to treat rapeseed and prevent cabbage-stem flea beetle from destroying the crop has been outlawed in the EU. Most farmers now won't grow rapeseed, because the risk of making a huge financial loss is too high. Result? We import rapeseed from countries which haven't outlawed the insecticide.