An outdoor exhibition has set itself a deliberately restrictive brief: twenty photographers were asked to picture the climate crisis without reaching for the imagery that has defined it for two decades. No polar bears on melting ice. No rows of gleaming wind turbines. The curators' premise is simple and, for anyone who has watched environmental photography ossify into shorthand, long overdue.

The exhibition's stated wager is that the visual vocabulary of climate change has hardened into cliché. The lone bear on an ice floe, once a genuine documentary image, has become wallpaper — reproduced on report covers, charity appeals and school textbooks until it signifies nothing beyond its own familiarity. Wind farms, the triumphant counter-image of clean-energy optimism, have fared little better: rows of white turbines against a blue sky now read as corporate messaging rather than photography. By banning both, the show forces its twenty contributors to work harder, and according to the exhibition's framing, they did not hold back.

What the photographers produced in place of the familiar icons is work that treats the crisis obliquely rather than declaratively. The strength of such constraint lies in what it compels: when the obvious picture is off the table, the photographer must find the trace, the aftermath, the quiet evidence — the subjects that ask a viewer to look twice rather than glance and nod. That shift from spectacle to implication is precisely what much climate imagery has lacked.

The outdoor format matters here too. Freed from the white cube, the photographs meet the public in the open air, in the very environment they describe — an apt setting for work about a crisis that unfolds not in galleries but in weather, water and soil. Outdoor exhibition also democratizes access: no ticket, no threshold, no prior commitment to the subject. Passersby encounter the work whether they sought it or not.

Twenty photographers is a substantial commission by any measure, and the scale signals institutional ambition. Group shows of this size inevitably carry unevenness — some contributors will answer a radical brief radically, others will merely gesture at novelty — but the exhibition's underlying argument holds regardless of individual success. The argument is that the climate crisis has outgrown its pictures, and that photography risks becoming decorative precisely when the stakes are highest.

The countervailing tradition is worth naming. Environmental photography has historically done its best work at the edges of the visible: not the disaster itself but its margins, its paperwork, its absences. By excluding the two most overexposed motifs in the genre, this exhibition aligns itself with that quieter lineage and asks its audience to do the interpretive work that the polar bear image has long allowed them to skip.

Whether the show's twenty commissions succeed individually, the gesture itself — a curated refusal of the genre's most bankable images — marks a useful corrective. The climate crisis will not stop generating photographs; the question is whether photographers can keep generating meanings. On the evidence of this exhibition's premise, at least some of them are trying, and the outdoor walls carrying their work suggest the conversation is moving out of the gallery and into the street.