The Olympic torch in the 2010 Winter Olympics in Vancouver has a limited environmental footprint, reports have indicated.
According to Discovery News, the torches were built by train and plane manufacturer Bombardier, the Olympic and Paralympic Winter Games.
Ninety-five percent of the materials used to make the torches were sourced locally within Canada.
Bombardier used recyclable components as much as possible, including the steel that makes up the torch's interior and the aluminum that makes up its exterior shell.
Bombardier also chose a fuel that minimizes greenhouse gas emissions, while normally in very cold conditions, an oil-based fuel would be chosen.
But, the company elected to use a fuel that is a mix of propane and isobutane, which burns in cold temperatures, provides a visible flame in daylight and emits 30 percent fewer greenhouse gases than an oil-based fuel.
In addition to thinking about emissions, the company considered energy consumption, which had an impact on energy as well.
They designed the flame to burn from the side instead of from the top.
"The side-flame design creates a longer flame effect and, consequently, when compared to an equivalent flame-height basis, usually consumes less energy than does a vertical flame design," said Bruno Comtois, lead project engineer for the 2010 Olympic Torch.
After the 2010 Torch Relay, the aluminum from the torches' cylinders and remaining fuel will be recycled.