Aljazeera: "Australia has begun putting a price on pollution, charging companies for their carbon emissions. The government says the carbon tax will promote a greener economy and help fight climate change. Prime Minister Julia Gillard has hailed the move. But critics say the law will stifle industry and increase the cost of living. Al Jazeera's Andrew Thomas reports from Sydney". What is $23/ tonne going to do to the world economy? Jump-start the much needed push towards real green economies or choke industry? What is your take?