"The price-increases stem partly from global energy costs, with the average natural-gas price in Europe for the October-December quarter 10 times as much as that for the year of 2020, according to World Bank data. Nitrogen production facilities rely heavily on natural gas to convert chemical raw materials into finished products, so rises in the natural-gas price often flow through into fertilizer costs. Major fertilizer producers including China, Turkey, Egypt and Russia also curbed exports in the second half of 2021, further pushing up global prices."