MINNEAPOLIS — The Minneapolis City Council is calling for bird-safe glass at the new Minnesota Vikings stadium.

The council on Friday unanimously approved a resolution urging stadium planners to outfit the $1 billion stadium with bird-safe glass.

Reports said the measure is symbolic and has no binding power. But it adds more pressure to calls from bird advocates to modify the design of the glassy building.

The Audubon Society of Minnesota praised the resolution. The group is concerned that many birds will die from colliding with the large windows slated to be installed at the stadium.

The Vikings say the team and the authority overseeing the stadium have agreed to implement lighting procedures to prevent bird collisions. The team also is discussing Audubon’s recommendations for the stadium’s lighting design.