Passersby pedaling to keep Christmas tree alight

The Christmas tree lights already are shining in many town squares, but I was glad to see at least one city is using bicycle-power to keep its �rbol de Navidad illuminated.

The warmth generated at the Mexican city park might not come from the Christmas lights on the tree, but the 15 volunteers who are pedaling at its base.

Visitors are pedaling to keep the tree lit in the city of Puebla, which is hosting a "Sustainable Christmas" fair this year.

The bicycles are attached to generators that charge two batteries ....

Source: http://www.bikingbis.com/blog/_archives/2011/11/28/4948404.html

2011 tour de france