Editorial Board

Europe Needs to Save Its Carbon-Market Marriage

Reuniting the EU and UK emissions trading systems would benefit both. Only politics stands in the way.

Incentives matter.

Photographer: Krisztian Bocsi/Bloomberg

When the UK left the European Union, it created a rift in the global fight against climate change: Suddenly, the EU’s ambitious carbon cap-and-trade system — designed to reduce harmful emissions of greenhouse gases throughout Europe — had to be split in two.

Now the UK and EU say they want to get their carbon markets back together, as part of a broader “reset” in relations. It’s a great opportunity to demonstrate that, despite Brexit, common sense in climate and trade policy can prevail.