ECOLO. ECOLO is the French-speaking Green Party in Belgium. Much stronger than Groen, its Flemish equivalent, ECOLO is capable of winning as much as 20% of the Francophone vote, making it one of the most popular Green parties in the world.

ECOLO is a broadly centre-left party, with strong left-liberal credentials. It is currently a junior coalition partner to the Socialists in the Walloon parliament and a member of the Brussels regional government. At the federal level it provides outside support for the governing coalition on constitutional reform issues.

ECOLO is a member of the European Green Party, where it is the second most loyal party in the Greens/EFA group, voting with the group 99.7% of the time.