The Massachusetts Port Authority believes the best way to reduce emissions at Logan International Airport is to add 5,000 parking spaces.

It sounds counterintuitive, but Massport CEO Tom Glynn makes the case on this week’s Codcast that more parking spaces will mean fewer people getting dropped off by friends, taxis, Ubers, and limousines. Those types of dropoffs typically involve a total of four trips to and from the airport — two when dropping off passengers and two when they are being picked up. To help win state approval for the parking proposal, Glynn recently enlisted the support of the Conservation Law Foundation by agreeing to additional measures to reduce emissions.