On a recent September weekday, nearly 100 employees from Extra Space Storage’s Utah headquarters planted 25 trees on an unshaded field at a nearby park.The outing – part of a partnership with the Arbor Day Foundation – generated excitement and company pride among employees but also points to a broader effort by the company to seek triple bottom line benefits.“A lot of the sustainability efforts we have done to date have been easy decisions to us because they are at the in...