Reuters: German Environment Minister Norbert Roettgen wants to delay his proposed 15-percent cuts in solar power incentives by one month until May 1 rather than April 1, government sources told Reuters on Friday. Roettgen has faced criticism from within his own party, with regional leaders urging him to delay or water down his proposed 15-percent cut in the incentives that utilities are obligated by law to pay producers of solar power. Solar power companies in Germany, where about half …