In their piece, Dr. Simone Tagliapietra and Prof. Andreas Goldthau argue that because climate commitments under the Paris Agreement are voluntary, climate laggards need to feel the costs of inaction. Trade, and more precisely an exclusive climate club, is the means to incentivize climate action. Yet, such a club should be open and cooperative so that non-members benefit from international carbon dividends when they foster their efforts. The German G7 presidency, Goldthau and Tagliapietra conclude, should heed the call of climate justice and support poorer nations in their transition to a low carbon future. For a longer version, see their whole take on Bruegel’s blog.