Trafalgar Square is hosting a forest of trees from Ghana this week as part of an installation by artist Angela Palmer. The sight of these gigantic stumps of trees with their huge tentacular roots next to the fountains and lions of the Square is strangely moving. The installation is designed to heighten awareness of climate change – particularly in Ghana where 90% of the rainforest has been cut down because of aggressive logging practices. After this the trees are off to Copenhagen for the Climate Change conference. Birnam wood is on the move!