The Olympic medals are designed especially for each individual Olympic Games by the host city's organizing committee. Each medal must be at least three millimeters thick and 60 millimeters in diameter. Also, the gold and silver Olympic medals must be made out of 92.5 percent silver, with the gold medal covered in six grams of gold. info taken from: http://history1900s.about.com/od/greateventsofthecentury/a/olympicfacts.htm
The materials used to make an olmpic football consist of pure pigskin
Clay
consruction metal domes
The radiation comes from the material used.
Dry graphite
Silicon
i think from different gases !!!!!
It is used for making petrochemicals
tungsten or sometimes copper
mud and fibers
cotton