St. Bede School

Katie Blackley / 90.5 WESA

The city of Zumala sits on the Nile Delta. Edible mushrooms feed on plastic waste and plants filter the water for residents and businesses. Suspended tubular trains carry the city’s 300,000 people from place to place, high above the buildings.

The fictional city cost less than $100 to build and was designed by 10 middle-schoolers.

Liz Reid / 90.5 WESA

Students from three dozen middle schools across the region gathered at Carnegie Music Hall Saturday for Pittsburgh’s 15th annual Future City competition.

Coordinated by the Carnegie Science Center, the competition challenges students to imagine and build the cities of the future.

Linda Ortenzo, director of STEM programs at the science center, said getting to the actual competition is a semester-long process.