Couple of great examples along these lines:
- Cisco Live Green Plan: Between 2008 and 2010 this event has slashed paper use for direct marketing and onsite from 22.5 tons to less than one ton!
- Intel Developer Forum: Hotel guests during IDF could generate over 75,000 pounds of laundry, using over 226,000 gallons of water to clean. If every IDF guest participated in the hotel linen re-use program offered by host hotels in SFO, it would cut the environmental impact in half. Check out Intel's quirky take on 'greening' IDF in this video.
- Canada Media Marketplace: In 2010 this small 270-attendee table-top marketplace made a big difference by diverting 3.3 tons of waste, or 64% from landfill.
Check out the links for more details!