Definition 

A carbon tax is a fee imposed on the carbon content of fossil fuels, which is intended to encourage companies and individuals to reduce their carbon emissions by making it more expensive to use fossil fuels. The revenue generated from a carbon tax can be used to fund climate change mitigation and adaptation measures, or to reduce other taxes. Carbon taxes are one of the policy instruments that can be used to achieve the goals of the Paris Agreement and limit the rise of temperatures below 2°C.