Caroline was first elected as Member of Parliament for Brighton Pavilion in 2010. She served as leader of the Green Party of England and Wales from 2008 to 2012, and Co-leader from 2016 to 2018. From 1999-2010 she served as one of the Party's first MEPs and represented the South East region until becoming the UK's first Green MP.
Caroline is Chair of the All-Party Parliamentary Groups on Climate Change and Limits to Growth.
She is a Co-Chair of the All-Party Parliamentary Groups on Fuel Poverty and Energy Efficiency and Democratic Participation, and Deputy Chair of the All Party Parliamentary Group on Renewable and Sustainable Energy.
She is Vice Chair of the All-Party Parliamentary Groups on Better Brexit for Young People, Choice at the End of Life, Drug Policy Reform, EU Relations, European Citizenship Rights, Food Waste, Land Value Capture, Proportional Representation, Pubs, Refugees, Sixth Form Colleges, State Pension Inequality for Women, Students, Visitors' Economy and West Papua.
She is an Officer of the All-Party Parliamentary Groups on Sustainable Food and Farming, Domestic Violence and Abuse, Hate Crime, Sexual Violence and Southern Rail.
She sits on Parliament’s influential Environmental Audit Committee and has also sat on temporary committees set up to scrutinise Government legislation.