levy on imported goods to counter carbon leakage, in order to avoid industries in countries with stricter rules being penalised
The aim is to counter “carbon leakage” whereby EU industries are penalised by cheaper imports from countries that apply less strict rules to tackle climate change. (https://www.reuters.com/article/us-climate-change-eu-carbontax-explainer/explainer-what-an-eu-carbon-border-tax-might-look-like-and-who-would-be-hit)