Participants hold hands as they attend a peaceful human chain event outside the venue of the 10th Conference of the Parties to the Convention on Biological Diversity (COP 10) in Nagoya, central Japan October 28, 2010. Participants formed a human chain in a bid to encourage a productive outcome from the U.N. meeting discussing ways to fight rising extinctions of plants and animals from pollution, climate change and habitat loss. [Xinhua/Reuters]