AUSTRALIA'S transport sector is caught in a dilemma: it must drastically reduce greenhouse gas emissions, but the means to do that is years away, according to a climate change specialist. Ben Wheaton, a partner in climate change services at PricewaterhouseCoopers, said greenhouse gas emissions from transport were growing at the fastest rate in the country, faster even than agriculture. Australian Greenhouse Office figures show that transport constitutes 13.5% of Australia's greenhouse gas emissions.