Angela Eagle has pledged half a million trees over three years. The number is big enough to feel like progress. But a letter from Diana Lowry of Epping — drawing on observable reality across the country — points to the structural flaw: roughly 80% of newly planted saplings die because nobody waters them after the ribbon-cutting. The arithmetic is brutal. If the 80% mortality figure holds, 500,000 planted trees become 100,000 surviving trees. The climate, shade, and water-storage benefits the programme is supposed to deliver are reduced by the same proportion. The government gets the press release; the soil gets kindling. This is a recurring pattern in UK tree-planting policy. Targets are set in units of planting — saplings in the ground — rather than in units of outcome — mature canopy established. The distinction matters enormously. A sapling costs a few pounds; the aftercare regime of watering, protection from deer and disease, and replacement of failures over three to five years can cost multiples of the initial planting. When budgets are allocated for planting but not management, the predictable result is mass die-off. The extraction here is subtle but real. Political actors capture the reputational benefit of a large headline number. Nurseries and planting contractors capture revenue. But the public, which funds the programme through taxation and expects climate resilience in return, bears the cost of failure. The carbon sequestration, urban cooling, and flood mitigation that justified the spending never materialise at the promised scale. Elsewhere in the Guardian's letters page, other readers raise unrelated but structurally interesting points: John Bridcut of Liss argues that any future EU-rejoin referendum should require a 60% supermajority threshold rather than a simple majority, a procedural point about constitutional resilience. Mark Hann notes the ambiguity in the term 'smart glasses' versus 'smartglasses' as Norway moves to restrict them in public spaces. The tree-planting problem is a case study in the gap between announcement and delivery. The government metric — trees planted — is an input measure. The public benefit metric — trees surviving to maturity — is an outcome measure. Until policy targets are rewritten around outcomes, every planting pledge carries an implicit asterisk: results may be 80% lower than advertised. The fix is neither expensive nor complicated. Mandatory aftercare contracts tied to survival rates at year three and year five, with holdback payments conditional on outcomes, would align incentives. Several European countries already use this model. The question is whether the political system values the photo opportunity of planting day more than the invisible, unglamorous work of keeping saplings alive.
