Top Eco-friendly Office Buildings

"Green building is a growing trend, in part because companies have realized they can actually save money by making a few environmentally friendly upgrades..The USGBC developed its rating system--known as Leadership in Energy and Environmental Design, or LEED--in 2000, and since then 715 buildings have achieved some level of certification...Energy efficiency and water conservation are both important parts of the rankings. But buildings can also receive points for using native plants in landscaping instead of just laying down sod." Other strategies include limiting waste, recycling, rooftop gardens, and the use of natural light.