Falling oil prices have put downward pressure on gasoline prices, now averaging $2.65 a gallon — about 85 cents cheaper than a year ago. Gene J. Puskar/AP hide caption

itoggle caption Gene J. Puskar/AP

The first foundation jacket installed by Deepwater Wind in the nation's first offshore wind farm construction project is seen next to a construction crane on Monday, on the waters of the Atlantic Ocean off Block Island, R.I. Stephan Savoia/AP hide caption

itoggle caption Stephan Savoia/AP

Organic farmer Margot McMillen holds a grape leaf damaged by pesticide drift on her farm, Terra Bella Farm, in central Missouri. Kristofor Husted/Harvest Public Media hide caption

itoggle caption Kristofor Husted/Harvest Public Media

A pedestrian crosses in front of a vehicle as part of a demonstration at Mcity on July 20, on the University of Michigan campus in Ann Arbor, Mich. Paul Sancya/AP hide caption

itoggle caption Paul Sancya/AP

Eric Pennucci of Horizon Air Services, a Boston trucking firm, does not like the idea of 18-year-olds behind the wheel of tractor-trailers. Chris Arnold/NPR hide caption

itoggle caption Chris Arnold/NPR