Agen: Australia on Wednesday pledged A$200 million (US$165 million) to the UN-backed Green Climate Fund to mitigate the impact of global warming on poor countries, bowing to international pressure. With its use of coal-fired power and relatively small population of 23 million, Australia is one of the world's worst per capita greenhouse gas polluters and has been increasingly isolated over its perceived reluctance to do more to tackle the climate threat. It follows the world's most powerful economies last...