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In this aerial view, cars driving on Iceland's ring road, Route 1, cross a small bridge over a river next to a much longer, abandoned bridge on the Skeidararsandur plain on August 18, 2021 near Skaftafell, Iceland. The longer bridge, originally built in the 1970s, crossed the then wide Skeidara river. However, in 2009, due to the retreat of nearby glaciers that feed the Skeidara, the river changed it course, leaving a much diminished flow at the previous location and making the longer bridge superfluous. Iceland is feeling a strong impact from global warming. Since the 1990s 90% of Iceland's glaciers have been retreating and projections for the future show a continued and strong reduction in size of its ice caps. (Photo by Sean Gallup/Getty Images)
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