 In a column for "Die Tageszeitung" published on 17 November 1989, eight days after the fall of the Berlin Wall, he predicted that reunification would not happen.On 1 October 1990, Fischer said he refused to celebrate reunification.Fischer was again environment minister in Hessen from 1991 to 1994 and then became co-chairman of the Greens' parliamentary faction in the Bundestag.