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Il grafico da “Crop pests and pathogens move polewards…” di Daniel Bebber et al. su Nature Climate Change, si vede solo a pagamento, metto una didascalia: we demonstrate an average poleward shift of 2.7±0.8 km yr1 since 1960, in observations of hundreds of pests and pathogens, but with significant variation in trends among taxonomic groups.… Continua a leggere Migranti