A new Cornell University study offers clearer details on how much shade New York City trees provide. The researchers found that not all trees throw the same shade – even when they’re the same size.

Landscaping under any tree can be challenging, thanks to the dense shade cast by the branches and the abundance of thick roots in the soil. But black walnut trees (Juglans nigra) seem to be in a ...

In 2010, Phoenix City Council approved an ambitious goal to plant enough trees to shade 25% of the city by 2030. Thirteen years later, city officials don't know how much progress they've made, if any.