Carbon pricing offers a cost-effective way to reduce greenhouse gas emissions. Ten states are already pricing carbon, and a number of states are considering similar action. This fact sheet summarizes and compares nine carbon pricing proposals introduced in the 115th Congress (2017–2018), highlighting similarities and differences. Seven of these proposals would establish a carbon tax (or “carbon fee”) and two would establish a cap-and-dividend program (a cap-and-trade program that rebates program revenues to consumers). The nine proposals are: