What's the timeline for this? 1 year? 5 years? 50 years?
How do we produce enough synthetic food for ~70million citizens? Do we import it? Where from?
What happens to all the land purposely used for grazing animals and growing animal feed? What about the 700k people who work in agriculture plus all the additional jobs that would be lost?
If we produce it ourselves, what's the cost of creating all these labs and factories? Where do all the workers come from?
How do we replace all the lost money from no longer exporting "proper" food? What happens to our trade deals with other countries when we announce we won't be taking any food from them?