PUBLIC MARKS with tags pollution & article

There's a new proposal ("URL shortening that doesn't hurt the Internet") floating around for using rev="canonical" to help put a stop to the URL-shortening madness. It sounds like a pretty good idea, and based on some discussions on IRC this morning, I think a more thorough explanation would be helpful. I'm going to try.

La Terre se réchauffe en raison de l'accumulation de gaz à effet de serre générés par les activités humaines. Le principal de ces gaz est le dioxyde de carbone (CO2) qui résulte du gaspillage des combustibles fossiles, en particulier du pétrole, d