Developers are concerned about the new green roof requirements just passed by the City of Toronto in May 2009. Part of their concern is that the green roof requirement will force them to forgo other green options. They are also concerned about the increasing height of many Toronto office and residential towers and the fact that green roofs have not been tried on structures that high. What is interesting is that Toronto, unlike Chicago, is the first city to mandate green roofs for ALL new large project buildings (though Chicago was able to mandate green roofs for buildings which they contributed funds towards or which needed public approval). For the full story, click here.