CATL billions, a 70-year-old nuclear plant, fusion: how much do you know about this week's green energy news?

Seven questions on the Debrecen battery plant's subsidies, the demolition of the world's first commercial nuclear plant, fusion prospects and UK home retrofits – based on fresh news.

1. How much non-repayable state aid can the CATL plant in Debrecen receive under the support agreement?
2. How many years after it started operating is Calder Hall, the world's first commercial nuclear power plant, being demolished?
3. What will be built on the Calder Hall site after the clean-up?
4. When could fusion energy become commercially usable according to current expectations?
5. Which country could Slovakia soon overtake in the share of nuclear in electricity generation?
6. By how much would the GBP 15 billion UK home retrofit programme cut energy bills per year, according to E3G?
7. How many jobs would the UK retrofit programme create according to E3G, versus about 1,100 at the Rosebank oil field?