A lot of it is price driven, not surprisingly. Certain countries say, “We are in a competitive economy, and we believe we can supply food safely for a lower cost.” That is what our research and that of others is starting to challenge.
In terms of global supply, we talk a lot now about international jet travel. For example, we can travel around the world in 12 hours or what have you, hence the current problems with coronavirus, but many people forget about migratory birds. We know that some birds fly thousands of miles north and south, east and west. They can bring disease with them. That is partly why we have the problem of emerging diseases that we must be conscious of for the future. We have had concerns, for example, with avian flu and DEFRA maintained high surveillance of the farms where avian flu had an impact, to ensure that it did not decimate the poultry industry in the UK.
Those are all issues that we will have to face. We do not live in a sterile world. We have mass migration of people and particularly of wild birds. We must allow for that in all our farming practices and ecosystems services. I maintain that good husbandry practice is the way forward. The previous speaker mentioned factory production, and I agree with him in that very good supply chains are now being established for vegan burgers, much of which is produced from bacteria and fungi. That is a good thing.
Vertical farming is starting to become more prevalent. That is the horticulture where crops such as salads are grown in an aquaculture-based system, and everything is stacked up. We are now seeing very large factories where they control the quality of the water, the lighting regime and so on. That seems to be a very safe, nutritious way to produce salads. In the winter the UK imports a lot of salads from the Mediterranean countries—we used to import a lot from Kenya, but I think that is reduced now. We used to import a lot from Florida and California, and that is a carbon footprint, but if we can do more vertical farming ourselves, particularly in the winter, that is a substitute. We can get this mix of what we might call modern biotechnology with more traditional farming.