I disagree that greens did not achieve much.
They have completely changed the political discourse in germany.
After 30 years of the greens being in the Bundestag, we now have the largest percentage of renewable energy in europe (>20% of our energy already comes from it), even the most conservative of parties now subscribe to quitting nuclear energy altogether (7 reactors have been shut down already, the rest is to follow until 2021) , we have the strictest environmental laws in europe, and on and on.
I would say the greens have been very successful by any measure.
After 30 years of the greens being in the Bundestag, we now have the largest percentage of renewable energy in europe (>20% of our energy already comes from it), even the most conservative of parties now subscribe to quitting nuclear energy altogether (7 reactors have been shut down already, the rest is to follow until 2021) , we have the strictest environmental laws in europe, and on and on.
I would say the greens have been very successful by any measure.