Healthy forests help combat climate change, provide humans with drinking water and even improve mental and physical health.

A household salary of $80,000 might be enough to live comfortably in only nine of the nation’s 50 largest cities. Even a $90,000 salary delivers a comfortable lifestyle in only 17 of the biggest U.S.

Big cities are economic powerhouses. New York City by itself generates nearly 5 percent of America’s GDP with only 2.5 percent of the country’s population. But how much of New York’s success is ...

For decades, as the American economy tilted toward white-collar work, big urban counties thrived. Cities like New York, Boston, Chicago, and San Francisco boomed on the back of fast-growing service ...