1, the Fed's interest rate hike may lead to the appreciation of the US dollar. Since urea is a commodity, its price is usually related to the exchange rate of the US dollar. If the dollar appreciates, the price of urea will rise, because the appreciation of the dollar will make urea more expensive in the international market, thus reducing demand.

2. The Fed's interest rate hike will lead to a slowdown in global economic growth. Raising interest rates will lead to an increase in borrowing costs, thus curbing corporate investment and consumer spending. If the global economic growth slows down, the demand for urea will be affected because urea is mainly used in agriculture, which is usually closely related to economic growth.