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Initiatives by topic
Sustainable transport activism
Waterways: Wikipedia: Canals in Hertfordshire (category)
Trees, woodland and forest
Watling Chase Community Forest is an area of 72 square miles located in north London and south Hertfordshire around the towns of Potters Bar, Radlett, Borehamwood and Barnet. It includes Aldenham Country Park, Scratchwood, Moat Mount Open Space and the Watling Chase Timberland Trail, a waymarked walk of 16 kilometres.
It was set up in 1991 and is one of twelve community forests in England set up to regenerate the countryside in and around urban areas. They are sponsored by Natural England and the Forestry Commission which work with local authorities and voluntary bodies to manage them. W
Nov 25 “What can we do about air pollution in St Albans?", public meeting
February 27 Eco Fair and Seed Swap tringintransition.org.uk
News and comment
Second St Albans Sustainability Week proves district is keen to keep it green, Dec 2 
Network St Albans should be copied around the country,  April 20
Green St Albans, thoughts from St Albans' first Green Councillor
Honey Map, Herts Bees