Why, oh, why did the "green" roof collapse? You'd think it would have been "sustainable."

Isn't nature sympathetic to our efforts to be good people?

A 700-by-50 foot section of a roof over a parking area buckled on Feb. 13 at a garden pond construction and supply company in St. Charles, Ill., west of Chicago. No one was injured in the collapse, which occurred on a Sunday afternoon when few people were working at the company, Aquascape Inc.

Nearly a week later, investigators were still waiting to try to determine why the roof collapsed,  said Ed Beaulieu, a company vice president...

“The collapse happened right at the beginning of the thaw,” he said, leading to speculation that ice on the roof might have prevented meltwater from draining off. “But right now no one really knows.”

If you don't know the answer to a question like that, you shouldn't be putting tons of water absorbing dirt on top of a gigantic roof.