While building a sustainable company may seem unnecessary and costly, consider the alternative: being unsustainable and—vulnerable. "Incorporating sustainability into any company's operations is a hefty issue. But it's also an increasingly popular shift to make. 'It's an increasing liability to not do it,' says Summer Rayne Oakes, co-founder and C.E.O. of Source4Style, the online fabric marketplace, which is based in New York City. 'There are a lot of companies out there, that understand that they won't be leaders within the field but they don't want to be laggers either.'"