US diesel hits record $5.85 a gallon: Why are fuel prices rising?

US diesel prices (AP)US diesel prices hit a record high on Friday, rising to an average of $5.85 a gallon as the six-month war with Iran disrupts global fuel supplies and pushes up transportation and production costs.Diesel is widely used by freight, delivery, farming and industrial networks. Higher prices are therefore expected to raise the cost of transporting a wide range of goods, with some businesses already passing on the additional costs to consumers through delivery and online-order fees.The impact is being felt particularly in the grocery sector, including produce, meat and other perishable goods that need frequent transportation. Farmers also rely heavily on diesel-powered equipment, adding to production costs.Experts warned that the pressure could increase if diesel prices remai