Picea abies outside of its native range, and one of the most economically important coniferous species in Europe. It is used as an ornamental tree in parks and gardens. It is also widely planted for use as a Christmas tree. Every Christmas, the Norwegian capital city, Oslo, provides the cities of London (the Trafalgar Square Christmas tree), Edinburgh and Washington D.C. with a Norway spruce, which is placed at the most central square of each city. This is mainly a sign of gratitude for the aid these countries gave during the Second World War. In North America, Norway spruce is widely planted,
Aluminum Christmas tree Aluminum Christmas tree An aluminum Christmas tree is a type of artificial Christmas tree that was popular in the United States from 1958 until about the mid-1960s. As its name suggests, the tree is made of aluminum, featuring foil needles and illumination from below via a rotating color wheel. The aluminum Christmas tree was used as symbol of the commercialization of Christmas in the highly acclaimed and successful 1965 television special, "A Charlie Brown Christmas", which discredited its suitability as holiday decoration. By the mid-2000s aluminum trees found a secondary market online, often selling for high premiums. The trees have