Stapleton, Denver Lake Nature Center, one of the nation's largest urban wildlife refuges. As of 2018, Stapleton has a population of around 75,000 residents living amongst 23,500 households. The Northfield section of the development (north of Interstate 70) still has significant residential and commercial development occurring today. The University of Colorado A-Line directly connecting Denver Union Station downtown to Denver International Airport started operating in 2016 and has one stop in Stapleton; the Central Park Station. Stapleton is served by the Central Park commuter rail and bus station, with direct connections to Union Station in downtown and the Denver International Airport via
San Diego International Airport Diego International Airport entered the blogosphere with the launch of the first employee blog–the Ambassablog–for a major US airport. Written by front-line employees, the blog features regular posts on airport activities, events, and initiatives; reader comments; and several multimedia and interactive features. It has been presented as a case study in employee blogging to several public agencies at the federal, state, and local levels. In February 2008, San Diego International Airport was one of the first major airports in the US to adopt a formal sustainability policy, which expresses the airport's commitment to a four-layer approach to sustainability known as