You’ve seen them on the horizon,those strange machines bobbing up and down in oil fields,but have you ever wondered how oil pumpjacks actually work? These iconic structures are more than just ...

PepsiCo says it has converted engines in 20 semi trucks traveling Iowa so it can use 99% biodiesel and cut carbon emissions.

Iowa Secretary of Agriculture Mike Naig said the new pump, which allows certain semi trucks to fill up with a 99% biodiesel blended fuel, shows a completion of the ag supply chain, from the field to ...

Photo by Brent Barnett/Brownfield A fuel retailer in Iowa has opened the state’s first B99 biodiesel pump. Dave Walton with ...