Photographer Mitch Epstein's years-long project highlights the majesty and vulnerability of old growth forests across the US ...

Image by Ed Faison. In Mohawk Trail State Forest in Massachusetts, Moomaw studied the tallest grove of white pine trees in New England, aged between 150 and 200 years, observing how the trees grew.

As such, promoting fast-growing trees could strengthen efforts to mitigate climate change. This raises a key question for forest managers ... oaks and many types of pine trees.