These walkable cities offer easy access to amenities, public transit, and green spaces—all without needing a vehicle. Explore them here, along with their environmental and health benefits.

At current rates, most offices and homes will not be retrofitted for decades or even centuries to acceptable levels of energy efficiency. One approach is mandatory building performance standards—requiring existing buildings to meet a performance benchmark (energy or carbon intensity, performance rating, etc.), with owners having multiple years to bring buildings into compliance.