Delaware Senator Tom Carper is getting some advice from the state's former environmental chief.
Collin O’Mara, now president of the National Wildlife Federation, urged the Democrat to oppose a measure allowing higher amounts of ethanol to be mixed in with gasoline.
The bill would lift a 10 percent cap during the summer months.
The Wilmington News Journal reports that Carper has said he has not made a final decision on the measure that would change the limits in the Clean Air Act rule.
The Act mandates the inclusion of ethanol aimed at reducing greenhouse gases.
But the News Journal reports that a number of studies found that ethanol increases the ozone in the atmosphere affecting those with sensitive lungs.
