Basically all. The Dutch regulations are the most strict in the world while the technology is super advanced. So it's produced with the least amount of water, least amount of pesticides as the strains are modified to be resistant by themselves against pests, fungi etc and with high quality fertilizer. We're a tiny country but one of the largest food exporters of the world (source) with the highest quality. Here's an article on why we're so good at it. Yet we export most of it as the high quality profits the most while we're cheap and don't care about quality. It's so weird.