Gel Gravel Mix Gives City Trees Room to Grow

Trees bring both comfort and measurable benefits to urban environments. The problem is that tree roots don’t flourish under all that pavement. Now scientists think they may have found the answer.

“The way we lay pavement is antithetical to how we want trees to grow,” said Nina Bassuk, director of the Urban Horticultural Institute at Cornell University in Ithaca, New York.