Londoners were urged to recycle their Christmas Trees as the huge Norwegian spruce in Trafalgar Square was shredded for compost.
The tree was a gift from Norway
Green London Assembly member Jenny Jones helped load the tree into a chipping machine in the central London square on Friday.
The 21.5m fir will make about 15 bags of mulch which will be used as fertiliser in Parliament Square.
It is hoped people will be motivated to recycle all their festive waste.
Ms Jones said a variety of services for recycling Christmas trees and other waste were on offer and urged people to contact Recycle for London or their local council to find out more.
1.5m pickle jars
"We need to make 2006 the greenest year yet for London and we can start by recycling the remains from the old year," she said.
This Christmas it is estimated that Londoners have sent around 123m Christmas cards, consumed around 1.5m jars of pickles, put up 976,000 trees and used enough wrapping paper to cover Hyde Park four times.
The tree in Trafalgar Square is between 100 and 120-years-old and four metres wide.
Once it has been chipped it takes 10 weeks for the wood to become compost. The Christmas tree was a gift to Londoners from the people of Norway, in recognition of Britain's support during the war.