8,000 trees will be planted in Essex today by 8,000 London Olympics volunteers.
The new trees will create six hectares of woodland at Dagenham.
Mayor of London Boris Johnson says it is a lasting green legacy from the 2012 Games.
'Green spaces are the lungs of our city, breathing life and vitality into communities,' he said. 'I hope that the Jubilee Woods will inspire anyone who has a hankering to help make London a greener, cleaner, better place to live to get involved in volunteering.'
The Olympics volunteers helped visitors during the Games and will travel from across the UK for today's planting.