Tomas: Where do you live? http://www.irondalecafe.com/history/ purchase pioglitazone Simple: It’s a tax on carbon dioxide (CO2) huffed into the atmosphere when we burn coal, oil, natural gas, gasoline, and any other carbon-based fuel. CO2 is the biggest contributor to climate change, and putting a tax on it is one way to encourage people to spew a little less of it. There are different ways to structure these taxes, but the generally accepted method is to collect them at the source: The coal company or the oil company pays based on the amount of CO2 their product will create.