Concrete

As oil prices rise, so does the cost of asphalt. Concrete, historically more expensive, is now becoming a viable cost competitor. Because of its lighter shade, its also been shown to contribute less to climate change.

Advances in material development have brought to the market a new type of concrete that can bend under pressure and heal cracks with the addition of water.

Concrete in a Minneapolis bridge replacing that which collapsed in 2007 is made of a concoction that boasts less environmental impact and durability. And it's self-cleaning.