As an environmentalist and humanitarian, Jadot coordinated Greenpeace actions in France between 2002 and 2008, also heading the Alliance pour la planète and serving as a key player in the 2008 Grenelle Environnement talks.

[1][2][3][4] In 2009, Jadot announced that he was leaving Greenpeace to lead the Europe Ecology list in the West France constituency in the 2009 European elections.

[13] In 2016, Jadot was selected by Europe Ecology – The Greens (EELV) to stand as their candidate in the 2017 French presidential election, after defeating fellow MEP Michèle Rivasi in the second round of primary voting.

[14] Though Jadot secured 496 sponsorships just before the opening of the signature collection period,[15] he announced that he would withdraw his candidacy and endorsed Socialist nominee Benoît Hamon, the pair having agreed on a common platform.

[22] Jadot's 2014 book, Climat, la guerre de l'ombre, was illustrated by comic artist and author Léo Quievreux.