Tthe Port of Long Beach is making plans to build a new “green” headquarters building as it pursues a larger program to clean up the air at the complex.

The nine-story, $218 million structure would replace its current cramped headquarters, which was built nearly five decades ago.

The new building will include a variety of environmental features, including a design that uses natural light to cut energy usage, which the port says will qualify it for environmental certification from the U.S. Green Building Council.

“This upfront investment would give us long-term savings on energy costs, a more efficient workplace and more publicly accessible facilities,” said Richard Steinke, the port’s executive director, in a statement.

The port plans to gather comments from the public before proceeding with construction, which would take about five years to complete.

The announcement comes as the port pursues a plan that would replace thousands of old, diesel-spewing trucks that carry goods to local warehouses. The port complex, which includes the neighboring Los Angeles port, is the largest single contributor to air pollution in Los Angeles.