Estimated to contain around 4.5 million trees , Sheffield has more trees per person than any other city in Europe .
According to Sheffield City Council , Sheffield is England 's greenest city , a claim that was reinforced when Sheffield won the 2005 Entente Florale competition .
Estimated to contain around 4.5 million trees , Sheffield has more trees per person than any other city in Europe , and according to Sheffield City Council , it is England 's greenest city , a claim that was reinforced when it won the 2005 Entente Florale competition .