Vapour rises from a coal fired power station near Lithgow, about 120km (75 miles) west of Sydney May 27, 2009. On the rolling hills of Winona, a fine merino sheep stud, a quiet revolution is taking place which Australian farmers hope will eventually see them selling soil carbon credits in the fight against climate change. Reuters Pictures 7 months ago

Vapour rises from a coal fired power station near Lithgow, about 120km (75 miles) west of Sydney May 27, 2009. On the rolling hills of Winona, a fine merino sheep stud, a quiet revolution is taking place which Australian farmers hope will eventually see them selling soil carbon credits in the fight against climate change.