This DC apartment building provides low-income families with solar power and a resilience center

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.

Detroit offers a model for providing residents with no-interest loans to perform upkeep on their houses, thereby working to stimulate the local construction economy and improve quality of life.

An ambitious plan for the 69-acre Regent Park neighborhood is disrupting entrenched notions of class, race and religion, at a time when concerns over income inequality and immigration are growing.

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.

Ohio has more than 50 land banks, which are best known for reducing blight by demolishing old buildings, but several land banks are trying creative ways to enhance their land on a budget. Successful projects include a program for locals to redevelop old lots, a pop-up art gallery in a condemned house, and urban forests to make communities more welcoming. The collective effect of these projects is to revitalize cities all across the state.

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.

Landed will pay for half a teacher's down payment on a home in exchange for a quarter of profits when the house is sold down the line. The San Francisco-based startup has recently arrived in Bellevue, where the median home price is hovering around $1 million.

A racially integrated middle-income housing unit in the Bronx serves both as an inspiration and an enigma in the New York City housing market. Co-op City, which just celebrated its 50th birthday, accepts tenants of all income brackets and ethnicities, serving as a model in an otherwise quickly gentrifying neighborhood.

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."

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.