Radar Signals

France has discovered something unexpected. National biomonitoring data suggest that large parts of the French population are exposed to higher levels of cadmium than previously recognised. The source is not an industrial accident or environmental disaster. It appears to be the gradual accumulation of cadmium through everyday foods consumed over many years.

The obvious question for Ireland is whether the same pattern exists here. The answer is surprisingly simple.

We do not know.

Ireland shares some of the conditions that have prompted concern elsewhere. We import phosphate fertilisers whose cadmium content can vary. Much of Ireland's soil is naturally acidic, increasing cadmium uptake by plants. Potatoes, a staple of the Irish diet, are among the crops capable of accumulating cadmium from the soil.

None of this demonstrates that Ireland has a cadmium problem. It does suggest that Ireland has a question worth asking.

Cadmium presents a particular challenge because it accumulates slowly. If exposure becomes a public-health concern, it is likely to emerge over decades rather than years. By the time effects become obvious, significant accumulation may already have occurred. France's findings should not prompt alarm. They should prompt curiosity.

A prudent society does not wait for certainty before it begins looking. It asks whether an issue deserves attention and gathers the evidence needed to answer the question properly.

Cadmium may prove to be a minor concern in Ireland. Equally, it may prove to be something we should have started measuring sooner. At present, we simply do not know.

Further reading: My full analysis, Cadmium and the Questions Ireland Isn't Asking, is available on Marshall on Policy. https://go.marshall.ie/Cadmium-and-the-Questions-Ireland-Isnt-Asking

An absence of evidence risks being mistaken for evidence of absence.

© David Marshall • attribution • marshall.ie • dm.ie

Most major crises arrive with warning signs.

A scientific paper. An unusual statistic. A local report. A regulatory loophole. A pattern that appears insignificant on its own but becomes difficult to ignore when viewed alongside other evidence.

The challenge is rarely the complete absence of information. More often, the information exists but remains fragmented across institutions, disciplines and jurisdictions. By the time the pieces are assembled into a coherent picture, significant harm may already have occurred.

Radar Signals is an attempt to look earlier. This colum will focus on emerging environmental, public health, social practice and policy risks that may deserve greater attention than they currently receive. The aim is not prediction, and certainly not alarmism. Most signals will lead nowhere. Some risks will prove less serious than first imagined. But occasionally a weak signal becomes a strong one.

History offers many examples of hazards that were visible long before they became recognised public issues. In retrospect, the evidence often appears surprisingly clear. The question is why it was overlooked, discounted or ignored.

The purpose of Radar Signals is to examine those early indicators while there is still time for scrutiny, debate and, where necessary, action. Posts will be brief and focused. Each will explore a single signal, trend or concern. Where deeper investigation is available, readers will be directed to longer analysis elsewhere, including at Marshall on Policy and other linked publications.

Governments, regulators and institutions face an increasingly complex world. New technologies, environmental pressures and public health challenges generate more information than ever before. The difficulty is deciding which signals matter.

Not every dot on the radar represents a threat. But the ones that do are often visible before they appear on the front page.

David Marshall Dublin, Ireland

© David Marshall • attribution • marshall.ie • dm.ie