This is very much wrong. The Greens were never in a coalition with CDU/Merkel. (Merkel was in coalitions with the SPD/Social Democrats and FDP/Liberals.)
Greens were in a coalition with the Social Democrats led by Chancellor Schroeder; Schroeder agreed to the Greens’ demands for nuclear exit and negotiated a board role at Gazprom for himself after his political career.
Merkel initially wanted to reverse or freeze the exit timeline but bowed to public opinion to continue it once the tsunami hit Japan.
Greens were in a coalition with the Social Democrats led by Chancellor Schroeder; Schroeder agreed to the Greens’ demands for nuclear exit and negotiated a board role at Gazprom for himself after his political career.
Merkel initially wanted to reverse or freeze the exit timeline but bowed to public opinion to continue it once the tsunami hit Japan.