On June 6, Ukraine suffered an environmental catastrophe. The collapse of the Kakhovka dam in the south of the country sent water thundering downstream, killing more than 100 people according to Ukrainian officials. It wiped out villages, flooded farmland and nature reserves, and swept up pollutants like oil and agricultural chemicals as it made its destructive path towards the Black Sea. The causes of the collapse have yet to be established – whether it was targeted as part of Russia’s war in Ukraine, or whether it was a structural failure – but what is certain is that it is one...