Some two centuries later, the now cherished tradition of planting a newly cut tree in the middle of living rooms and covering it with lights and baubles is still alive and well across much of the world. Today, over eight million Christmas trees are sold annually in the UK, and an estimated 25-30 million are sold in the US. Real trees may also be coming back into fashion among younger generations – one recent US survey found millennials are 82% more likely than baby boomers to get a live tree.