Human influence on the environment is now so strong that a new geological era has been proposed (Crutzen & Stoermer, 2000), the Anthropocene, the Age of Man, the era shaped strongly, for the first time in human history, by humans. It is largely a destructive influence (Nielsen, 2005, 2006, 2007) threatening our own existence, the influence reflected in the human-mediated climate change, in the ...