With LEED for Commercial Interiors, tenants of non-green buildings can still improve their working environment and use LEED certification to achieve their sustainability goals.

For companies aiming to latch onto society's increased focus on the environment, Earth Day is the time to do it. Business participation in the day ranges from sales to teaching tools, and while some actions are more light green than others, many businesses are putting forth real, substantial efforts.

Large companies in sectors from retail to automobiles have taken innovative steps in design, facility management and across operations to reduce the trash they produce to zero. Here's how just about any company can achieve nothingness.

Small businesses, by their sheer numbers, have the potential to make a huge impact on the environment, and groups organized at the national, state and local level are working to spread sustainability to independent companies that want -- and need -- to go green.