Conversation so far:
What are some of the green building practices?
In 1990, the Mart Center began using Green Seal-approved green cleaning products and the next year implemented a recycling program.
What did the recycling program include?
all forms of paper products, glass, light bulbs, batteries, aluminum and construction materials.
How was the recycling program ran?
enter into an agreement with the district cooling system now known as Thermal Chicago, thus contributing to the national effort to reduce the discharge of ozone-damaging CFCs.
Was the recycling program a success?
To date, the Mart Center has reduced pollution by 264,018 pounds (119,757 kg), the largest reduction by a commercial building.
Did they encounter any problems with establishing green practices?
The Mart has nine LEED-certified showrooms, with five others on their way to LEED certification.
How do you get LEED certification?
CANNOTANSWER.
Are there any other interesting aspects about this article?
More than eight percent of the estimated 10,000 people working at the Mart walk, bike or take public transportation.
What kind of jobs do people work at in the mart?
CANNOTANSWER.

Question: What are some of the businesses?
Self-contained rewrite: What are some of the businesses of the Mart Center?