Original sentence: On 28 May, an £8M project finalised with the opening of a  walkway, which connects the terminal building to eight new pre-boarding zones, each with its own jetway.Prior to May 2010, the airport did not have any jetways, so all aircraft had to park on the apron and passengers either walk out to their flights, or carried by bus
Edited sentence: On 28 May, an £8M project finalised with the opening of a  walkway, which connects the terminal building to eight new pre-boarding zones.This is to help reduce some of the airport's carbon footprint, and meant to make the transition through the airport more bearable and appealing.This is to reduce the need for passengers to be coached to their aircraft, instead being able to walk