Here's how to accelerate urban climate solutions.
The back story of Philadelphia's plan to build a 70-megawatt plant that will power up to 22 percent of its municipal government.
After a decade of debate, concerns and confusion still exist but success in other cities may prove a useful bellwether.
As public awareness of composting models grows, a new vision is emerging.
Energy, water, food, materials, nutrients enter urban ecosystems and leave as emissions and waste. Here's how can cities turn this situation around.
With the constant turnover of land, many American cities are facing legacy hazardous waste that they didn't even know was there.
As city populations continue to grow, city governments must manage ever-increasing demands, consider trade-offs between differing values, and achieve their goals with limited capacity and funds.