Green Party Wehrling then became a spokesman for The Greens. In January 2005 he was elected the National Secretary of The Greens with 62% of the vote, coming after long and protracted negotiations. In December 2006
Cécile Duflot succeeded him to the post. Wehrling belonged to the environmentalist wing of the party, named "Pôle Écolo" (the Eco-Pole) ou "
Ecolo" (Eco). He worked with fellow Green politicians in the
European Parliament.
MoDem Following the
2008 French municipal elections in
Strasbourg, Wehrling became a member of
François Bayrou's Democratic Movement (MoDem). As a consequence, he was excluded from the Green Party. Ahead of the
2014 Paris municipal election, Wehrling joined the campaign team of candidate
Nathalie Kosciusko-Morizet. In 2017, Wehrling succeeded
Marc Fesneau as secretary general of MoDem, under the leadership of chairman
François Bayrou. In 2018, Wehrling was appointed by
Minister of Europe and Foreign Affairs Jean-Yves Le Drian as France's ambassador on the environment.
Positive ecology On February 8, 2024,
Corinne Lepage and Yann Wehrling announced the launch of the "Positive Ecology & Territories" collective, for the 2024 European elections. ==Media action==