A tag page collects every article that addresses one narrow subject, no matter which desk produced it. That matters here more than in most subject areas: a question like methane, palm oil or vitamin B12 belongs simultaneously to nutrition, climate, farming and consumer choice, and reading only one desk's take on it gives you a partial picture.
Tags are applied by the writing desk to reflect what a piece genuinely covers, not to attract search traffic. If an article appears under a tag, the subject is discussed substantively in it.
Reading across desks
The value of a tag page is the friction between perspectives. The climate desk's account of a commodity's footprint, the farmed-animal desk's account of the welfare system that produces it, and the food desk's account of what to do about it at home rarely agree perfectly — and where they diverge is usually where the interesting question is.
How coverage accumulates
New tags appear when a subject earns sustained attention rather than a single mention. That means a sparse tag page is a signal in itself: the subject is either new to our coverage or handled under a broader heading. The related tags shown alongside are the ones that co-occur most often, which is a practical way to find the adjacent question you did not know to ask.
Tags differ between editions
Every language edition tags its own reporting, so the same subject may be deeply covered in one edition and barely present in another. If a tag looks thin here, the equivalent page in another edition may be substantial — the language switcher is a research tool as much as an accessibility one.