Budget

Members of Congress representing farm states are hoping to rewrite the federal highway funding law to steer money aimed at cutting vehicle air emissions to the purchase of biodiesel fuels by public bus fleets and other diesel fleet operators.

Biodiesel, which some have touted as an environmentally friendly alternative to traditional diesel fuel despite skepticism by environmentalists, is made from vegetable oils, such as soybean and grapeseed oils, so expanded use of the fuel could increases sales for farmers.