 So carbon border adjustments are a measure currently considered by the European Commission who might propose it next year as a measure to address the problem of carbon leakage. So carbon leakage is when industries might relocate some of their production due to the imposition of a carbon price in the EU. So these industries which might have to compete with industries from outside the EU might consider that it's cheaper to have production outside of the EU. So that's obviously an effect that the EU wants to avoid because then the emissions will also move to outside of the EU. So the European Commission has been considering this measure as a way to address this problem of carbon leakage. But there's a lot of questions that have to be raised around it. So the question is for example which sector should be covered or which countries should these measures be targeted at. But on top of that there are questions about how do we take into account the fact that other countries might already have climate policies in place for themselves. But there are also a lot of political questions that can be raised around these measures. So how do we take into account the fact that countries like China and India that are exporting some of these products to the EU might be negatively affected by a trade measure by the EU and what will they do in response. So there's a lot of very difficult questions that need to be addressed in the design of these measures. And it will be an interesting process to see how the EU will try and resolve a lot of these challenges. Ultimately I think the devil will be in the details.