Age: Two weeks ago, when Prime Minister Tony Abbott spoke before the General Assembly of the United Nations, he named four dire problems facing the world: the dangers posed by the Islamic State in Iraq and the Levant (ISIL), Russia's destabilising influence in eastern Ukraine, the outbreak and spread of the Ebola virus in western Africa and the economic malaise that continues to afflict many countries.
But Mr Abbott did not mention climate change at all. That failure was conspicuous because just two...