While deforestation has declined rapidly in the last 60 years, clearing trees to make room for farmland was once essential.
Even an island like England had farming going back thousands of years. Hundreds of dead tree trunks in the low-lying Fens of eastern England, caught in the machinery of Fenland farmers while plowing their fields,
were from yew trees that populated the area between four and five thousand years ago. Yet farmers did not cut them down, Fen yew woodlands died rapidly about 4,200 years ago due to climate change, when peat expanded the trees fell and were preserved until today. It is likely that a rapid sea level rise in the North Sea flooded the area with salt water.