Cool Roofs or Urban Trees: Which Solution Is Best For Fighting Extreme Heat?

The temperature in an urban neighborhood with few trees can be more than 10 degrees Fahrenheit (5.5 Celsius) higher than in nearby suburbs. That means air conditioning works harder, straining the electrical grid and leaving communities vulnerable to power outages. There are some proven steps that cities can take to help cool the air – planting trees that provide shade and moisture, for example, or creating cool roofs that reflect solar energy away from the neighborhood rather than absorbing it. But do these steps pay off everywhere?

Can Louisville’s New ‘Anti-Displacement Tool’ Redirect City Funds Toward Affordable Housing?

The City of Louisville, Kentucky, will soon begin using a newly-developed algorithmic tool that aims to stop city funding from going to housing projects that would displace local residents. The tool was mandated by a tenant-led 2023 law and, after a year of development by researchers at Boston University, was approved for use in November 2024. Now, it’s ready to be deployed on upcoming development proposals.

Why Are So Many Cities’ Homeless Policies Punitive?

There is a strong body of evidence on what works when it comes to resolving homelessness – housing – and what does not work – punitive policies like criminalization and homeless sweeps that move people around while discarding their belongings. So why do so many American cities seem vexed when it comes to this issue, constantly framing people who are unhoused as threats to public safety while simultaneously promising a compassionate approach?