Smoke from the Australian bushfires circling the globe

NASA says the smoke from Australias bushfires will travel a full circuit around the globe. The massive inferno's have already coloured the skies of New Zealand and South America. Hundreds of fires have been burning since September killing at least 28 people and destroying more than 2,000 homes sending plumes of smoke into the stratosphere. New Zealand based Space Scientist Duncan Steel spoke to Logan Church to explain how exactly it will travel the rest of the world.