They are known to be extremely keen on recycling.
But for Norwich's Greens, it would appear this doesn't just stop at tins and cardboard.
Lucy Galvin has been appointed leader for a third time following a four-month wait for the group to choose a new one, after Alex Catt quit the role in October last year.
She has promised to put "hope and action back into politics" following a turbulent period for the group, during which three councillors, including Mr Catt, have faced questions over their conduct.
Ms Galvin had previously led the party between 2021 and 2024, having served as a councillor for several years previously.
She also became interim leader in October last year, after Mr Catt quit the post. Following a vote this week, she has resumed the role again permanently.
Ms Galvin said: "I am delighted to be re-elected to continue to lead the group.
"Our priority is representing the people of Norwich. Residents appreciate our councillors' work for the city and have consistently voted us in. Our group has now grown to 16 - the largest number ever.
"We will continue to bring hope and action back into politics and will carry on working hard to do that."
As well as a long-serving councillor, the new Green leader also works as the communications and media manager for the MCS Foundation, a charity campaigning for the decarbonisation of housing in the UK.
Ms Galvin will hope to steer the Green group to less-turbulent waters following a year marred by criticism over poor turnout at meetings and questions over the conduct of some councillors.
Mr Catt, who said he resigned as leader due to "work commitments," has been under investigation for misconduct over comments he made online in March last year.
He accused Labour councillors of fuelling a "transphobic campaign" against his Green colleague Charlie Caine.
His posts relate to the intense scrutiny Mr Caine, a trans man, received from the press over claims he called a group of women holding a vigil for Afghan women "Nazis".
Mr Caine has not faced any disciplinary action over the incident.
Another Green councillor, Liam Calvert was also accused of "hypocrisy" by his tenants over claims he failed to fix mould issues in a home he owns, despite his repeated advocacy for improving housing standards in the city.
The Greens' leadership shake-up also sees former Labour councillor Ian Stutley appointed as deputy leader.
Mr Stutely defected to the Greens after being deselected by Labour following a fierce row with his colleagues over Christmas cards.
He fell out with the Labour party after his partner Karen Davis, also then a Green councillor, was dropped as the party's candidate for Norwich North, after which he refused to deliver campaign leaflets.
He said: "It's a privilege to be elected. I look forward to supporting Ms Galvin and the group as we continue to grow and deliver for Norwich.
"We have a strong team and a clear commitment to working hard for residents."
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