The Greens have 110 councillors in England at the moment.
They want more - and they'll be discussing how to do that at their conference this week.
But among some of the other issues under discussion will be the tricky question of controlling population.
Are they about to slap a child limit on families?
We put that question to their South East of England MEP, Caroline Lucas.
But first we asked her about her hopes for this week's conference.