Facing Population Boom, Cities Innovate

With the United States expecting to add 100 million people to its population by 2040, innovative cities around the country are using new technology to reduce congestion and environmental degradation now, and prepare for the future. From tiered highways that reverse the flow of traffic based on rush-hour conditions to wireless Internet service on public transportation, cities are finding ways to efficiently move people where they want to go when they want to go. To learn more about local innovations, read The Daily Green's feature, The Innovators.