Boston ? Clean landings are about to get a new meaning at Boston’s Logan International Airport.

This weekend the airport expects to nearly finish the first runway in the nation repaved with an environmentally friendly material called warm-mix asphalt.

The asphalt is heated to a lower temperature than normal, burning less fuel and emitting less carbon.

Airport operator Massport says on this project that means a cut of 4,000 tons of carbon dioxide and 400,000 gallons of diesel fuel.

The last batch of the asphalt will be laid on Runway 9/27 this weekend, though the runway won’t reopen until later this year.