The document discusses concentration in the fertilizer industry. It notes that fertilizer supply and trade are highly concentrated among a small number of countries. Specifically, three suppliers account for over half of urea supply, three-quarters of DAP/MAP supply, and four-fifths of potash supply globally. Major fertilizer companies tend to be headquartered in the top producing countries. Higher concentration means fertilizer prices are more linked and volatile to supply shocks. While nitrogen use declined 5% in 2022, phosphate and potash saw larger drops of 9% and 12% respectively due to varying reliance on fertilizers across regions and crops.