"Speedway's Environmentally Friendly Efforts"
"The Indianapolis Motor Speedway recycles 20 tons of cans, plastic and cardboard in May, plus all its motor oil, brake fluid and transmission fluid. Its golf course is certified as environmentally friendly by Audubon International. Its trash gets converted to energy.
Still, any time hundreds of thousands of people come together there are repercussions. Each May, the IMS generates a million pounds of trash and tons of carbon dioxide."Source: Indianapolis Star, 05/25/2009