Can plastic roads help save the planet?

A warehouse in Switzerland is being transformed into new creative workspaces. The catch: It’s being constructed out of reused building materials. About 70 percent of it is being made from old materials like wood floorboards, steel beams, and windows. A network of treasure hunters are on the lookout for used materials that can be used in constructing these buildings. The workspace is nearly complete and it already has tenants for all of the spaces. They were also able to cut the building’s carbon emissions in half.

Eastern Washington University recently built the first tall wood office building in the state joining hundreds of other large “mass-timber” projects in the United States. This growing industry constructs panels, beams, and columns from trees that need to be thinned to curb wildfires in forests. While wood buildings can be more expensive to build than ones constructed from concrete and steel, environmentalists are on board because wood can store carbon, which can help offset greenhouse gas emissions.

Snowsheds are just one tool in Canada’s arsenal to combat the impacts avalanches can have on their complex road systems. Snowsheds are aboveground tunnels where snow can travel over it and into the river, thereby reducing the number of road closures to cleanup the aftermath and allowing thousands of drivers to continue on their journeys. This idea is being explored by state officials in Wyoming as a way to improve their avalanche-mitigation tactics.

A failed bridge construction project in the 1960s in Wyoming to mitigate the impacts of avalanches inspired Washington state to complete a similar project fifty years later. The project included an elevated bridge that allows snow from slide paths to pass beneath the roadway, which ends up saving losses of economic activity due to road closures. While the construction can be expensive, Wyoming is looking to see if a similar solution can be applied to their own mountain passes.

Discarded plastic can serve as construction material for major infrastructure and public works projects. In the Philippines, private companies like San Miguel are stepping in to participate in the government’s infrastructure projects. Companies are increasingly looking at closed-loop systems as a way to address plastic waste and drive construction projects. Nestlé and Unilver are among the other companies working to recover discarded plastics. Some of the programs offer incentives like cash for returned plastic waste.

Powerhouse, a collective of architects, engineers, environmentalists, and designers based in Oslo, reimagines building design to address climate change. Not only are many of their structures energy-neutral, but they actually produce surplus energy. For example, Powerhouse Brattørkaia in Trondheim is an eight-story office that will generate 485,000 kWh annually. Such "energy-positive" building has made great strides in Norway.

Boston needs more parking spaces, especially in a neighborhood surrounded by water. It is looking to build an underwater parking garage, like the ones being built in Amsterdam, in order to free up street level space and add more parking to decrease car pollution from driving around searching for a parking spot.

The heating and cooling of homes accounts for some of the greatest energy consumption in the United States, and contributes significantly to the release of CO2 into the atmosphere. A movement of "passive housing" is cropping up in response - the building of small, low-impact houses that are energy efficient and eco-conscious. One in Boulder, CO - built by an amateur architect - has received international certification and may serve as a model for future housing construction.

Hempcrete, a combination of hemp, water, and lime, can be used as a more sustainable insulation option for buildings. The material improves energy efficiency, produces less carbon than options like fiberglass and foam, and will continue to capture carbon while used as insulation.

Pilot programs across the United States are testing recycled plastic and asphalt mixtures to pave roads and keep plastics out of landfills. A program in California saw success in their mixture’s durability.