I'd say that our biggest concern out of all of this is just the complete lack of due process. There was no scientific data produced to support this and no consultation with practitioners. Ultimately, there won't be any net benefit to the world.
Canada's nitrogen use efficiency is 72%, which is higher than the global average. Western European countries, for example, have a nitrogen-use efficiency of 61%. Limiting our productivity will lead to higher production in countries with a worse environmental track record than Canadian farmers'. Canadian farmers have been implementing the 4R fertilizer stewardship and best management practices for over 15 years now, with over six million acres verified, and this is all without government intervention.
This policy is disastrously uneconomical, unenvironmental and unscientific.