Alliance 90/The Greens, often simply referred to as the Greens, is a green political party in Germany. It was formed in 1993 by the merger of The Greens and Alliance 90. The Greens had itself merged with the East German Green Party after German reunification in 1990.

Green politics, or ecopolitics, is a political ideology that aims to foster an ecologically sustainable society often, but not always, rooted in environmentalism, nonviolence, social justice and grassroots democracy. It began taking shape in the western world in the 1970s; since then green parties have developed and established themselves in many countries around the globe and have achieved some electoral success.