Yesterday, we wrote a post about how
The National Stadium is built out of steel, which is formed into a lattice. This structure helps the venue with water conservation, pooling the rain water into a nearby pond. The rain water will provide 23% of the water used on the grounds, and the rest will come from industrial waste water and urban sewage. The recycled water will be used for watering the plants and washing the race track.
The 
Over 100,000 construction workers on the 2012 Olympics venue in London will be subjected to biometric tests while they build the site. The two-tier system will scan hands and faces, and should be up and running by June this year, when work starts on the 50-acre site. And these measures, part of the $700 million security budget, will not just be for the building contractors, either.












