New Zealand Herald: United Nations Secretary-General Ban Ki-moon has said that the battle for global sustainability will be won or lost in the world's cities.
Cities and urban areas are estimated to account for 80 per cent of global greenhouse gas emissions, and more than half of the world's population live in them, so what we do in our urban centres will, to a large extent, define the future of our world. Governments are struggling to agree on action against climate change, but thankfully many city authorities are...