Villagers shell almonds in the evening shade as a pensioner wends her way home on a donkey laden with food from the market. Overhead, a rare Bonelli’s eagle soars as church bells summon the faithful to mass, a sound that has echoed through centuries.
Welcome to the Sabor river valley in north-east Portugal, Europe’s front line in the battle against climate change. While attention has focused on the effect of cutting greenhouse gas emissions on the steel foundries and blast furnaces of the cities, it could be remote wildernesses such as the Sabor river that bear the brunt of the casualties.

Climate change 