Rent assistance and moratoriums on evictions are lagging behind the pandemic's impact on people's ability to pay, researchers report.

More people bike to work in cities with bike-share systems, a new study shows. But convenience is key.

"Populations that are disproportionately affected by the coronavirus are largely the same as those at risk of more significant climate change impacts."

Honey bees that live in cities depend on a varied diet of trees, shrubs, and woody vines for food, depending on the season, a new study shows.

Recycling wastewater to make it drinkable again could drastically slash cities' need for fresh water resources, researchers report.

The COVID-19 pandemic has taken an especially hard toll on black Americans. Here, an expert puts the crisis into context.

When it comes to getting out important messages like health advisories, cities should tweet less, not more, researchers find.

"If you are in larger cities, you definitely have to be more careful, you have to act faster, and you have to engage in more intense social distancing."

Fiber optics make sense for monitoring earthquakes because "cities already have it as part of their infrastructure, so all we have to do is tap into it."

Urban expansion and falling population density in cities worldwide over the last 40 years are leading to problems with efficient use of land.