At first glance, city living, with its heavy traffic and expanses of concrete, doesn't seem like the picture of sustainable, organic living. However, the past several years have seen a revolution in how small business owners as diverse as farmers, furniture makers and beauty salons commit to sustainable products, practices and services. And as more Americans move to urban environments, sustainable city living has become more important than ever. Green City Beauty, a salon that offers skincare and sugaring (an all-natural hair removal method) to Philadelphia and New Jersey customers, recently shared tips for maintaining a "green" city lifestyle.