A carbon tax is a government charge placed on greenhouse-gas (GHG) emissions , usually applied to fossil fuels based on their carbon content (e.g., per ton of CO₂e ). The policy goal is to raise the cost of emitting so companies and consumers shift to lower-carbon options, while generating public revenue that can be recycled through rebates, tax cuts, or climate spending. Carbon taxes typically work in two ways: Upstream fuel tax : levied on coal/oil/gas producers or import