The article looks at how the EU could use money from carbon pricing to fund its budget. By doing this, countries that make a lot of carbon pollution might have to pay more. This could lead to countries with less pollution wanting lower prices for carbon. But countries with more pollution may want higher prices. So, overall, the EU might end up with less strict climate policies. The researchers also considered how what people buy can create pollution not covered by current rules. They also looked at how changes in EU climate rules might affect the rest of the world and global emissions.