AAP: The federal government will offer a much-awaited glimpse of its emissions trading plans when a green paper is released in July. A timetable released said the government would by the end of the year give a "firm indication" of the scheme’s trajectory, which would determine the initial price of carbon. Climate Change Minister Penny Wong reaffirmed the scheme – the centrepiece of efforts to curb greenhouse gases – would begin in 2010. The timetable includes …