That is a broad question, but I will try to be brief.
Consider for example neonicotinoid pesticides, which were introduced into the market to replace the use of organophosphorus in farming in Canada. The hope was that neonicotinoid pesticides would be less toxic than organophosphorus. Now we are seeing that is not necessarily the case.
We are on a kind of toxic treadmill. We are still waiting for the synthetic alternative to a product that must be restricted, as was the case with imidacloprid, whose risks to the environment the Minister of Health deemed unacceptable.
We recommend pest management by way of crop rotation, crop diversity, integrated control, and prevention, and that chemical products should be used as a last resort, very briefly and minimally. That is what our national strategy recommends.