Accession talks between the EU and Turkey have well and truly stalled, but trying to work more closely together on clean energy could benefit both sides, and help take fossil fuels offline.
The EU has big climate plans. With the right frameworks in place, neighbouring Ukraine could help Europe achieve its vision.
Eastern European leaders frequently hinder climate negotiations in Brussels, but this attitude is damaging their development as well as efforts to tackle climate change.
For too long the US has supported gas projects in Europe that offer alternatives to Russian gas imports.
A refusal by Russia to fully take part in the global clean energy transition could have serious economic and political repercussions for the country.
Countries in Eastern Europe are often seen as climate action laggards, but the reality is more complicated.