The ancient technology getting a second wind

Austria rolled out the KlimaTicket, an annual pass that gives the holder access to all forms of public transportation in the country, to encourage increased use of public transport with an eye toward climate change mitigation. The uptake has exceeded expectations with 134,000 tickets sold within just the first two months, but it's still unclear what effect the program will have on the country's carbon emissions.

Corporations concerned about their social and environmental impact must also consider the costs. Bcorps, a new form of corporation in the U.S., are using a rigorous certification process to gain consumers trust and boost sales.

With the prices of solar technology dropping and the opportunity to save drastically on energy usage and costs, businesses and organizations across the country are investing more in solar infrastructure for their buildings and facilities. The Better Buildings Initiative of the US Department of Energy is helping by providing guidance and documenting effective approaches and financing for renewables installations - from hotels, to schools, to big box retail.

Batteries have begun replacing power plants. Instead of fueling up a plant when electricity demand peaks, networked batteries can kick in and deliver stored energy, reducing emissions and saving money. The technology is increasingly affordable and reliable.

Funded by federal grant money, the state, and the Office of Naval Research, Hawaii County public transit has developed its first hydrogen-powered shuttle bus. What’s been called the “fuel of the future,” hydrogen fuel cells create a power source that’s only emissions are clean water vapor. While a seemingly viable and scalable clean-energy source, such development and infrastructure requires large financial investments that many states have yet to prioritize.

A benefit corporation called Burlap & Barrel brings together social enterprise work with quality products through the ethical production and distribution of single-source spices. The founders of Burlap & Barrel learned from previous business attempts and ethical quarrels to form a passion project that focuses on the quality, not quantity, of the spices.

Pennsylvania law is preventing a Philadelphia neighborhood from converting an empty lot into a solar farm, but community members are working to fight against this by citing neighboring states that are seeing positive impact from similar projects. One such project is in Massachusetts where shared solar energy systems is helping to offset "80 percent of the power needs of a nearby assisted living facility, an affordable housing development, a family-owned hardware store and a non-profit serving those with disabilities."

Old and neglected housing contributes to climate change because it runs on fossil fuels. In New York, outdated heating systems waste two-thirds of energy. The New York City Housing Authority is not only trying to create better, safer, livable affordable housing, but also cleaner and more sustainable housing. While the city is just beginning to explore how to do that, other cities, like Paris, have already begun the work of updating old buildings that are used for affordable housing and can offer a model for American cities.

Small towns across America are leading the shift towards renewable energy. Part of a series called "American Futures", this video visits Kansas, Pennsylvania, and California to learn more about green initiatives in biofuel, wind, and solar power. Although each solution is different, each are a new way of generating income for the residents of the towns and often comes with societal acceptance as well.

Solar energy is a clean, cheap, renewable, and land-efficient resource, making it a valuable technology to scale up in the face of climate concerns and clean energy. Diversifying the supply chain for creating and sourcing solar panels can help make solar energy more reliable when faced with geopolitical and human rights issues.