The H II region article links to Giant Molecular Cloud, which redirects here. Molecular Cloud has a section on Giant Molecular Clouds. This section links as 'Main article: Giant Molecular Cloud', which goes here so redirecting the Giant Molecular Cloud article to the Molecular Cloud article would be confusing.
Perhaps changing the redirect of Giant Molecular Cloud to Molecular Cloud rather than here, and removing the reference in the Molecular Cloud article to a 'main article' on Giant Molecular Clouds would be a good idea. Honestly all these articles could do with a proper cleanup though, which might be preferable.
Just going through a clean up. Moved the GMC redirect to Molecular Cloud as suggested.--Jason Kirk 08:51, 11 October 2006 (UTC)