She resumed her previous role as a prominent critic of Mel Lastman, arguing that his style of politics favoured backroom deals and often removed councillors from the decision-making process. Greene also called for the resignation of city planning commissioner Bruce Davidson in August 1983, arguing that his $265,000 debt to a major developer created a serious conflict-of-interest situation. She was one of only four councillors to oppose significant cutbacks to North York's public health department in June 1984, and was subsequently the only City Controller to support an affirmative action program for city.