The D.C. Council is debating whether to require every public school undergoing renovation to meet strict environmental standards, a move that could significantly increase the up-front costs of repairing the city’s crumbling educational facilities. With $2.3 billion to spend over 10 years, the District is in the midst of a “landmark period of school modernization,” Ward 3 Council Member Mary Cheh said last week. And every school, she said, should be held to the highest standards of energy and water efficiency.