, Art and Architecture for a Changing Planet 1969-2009' (open until 18th October 2009). www.barbican.org.uk Guerrilla gardener Richard Reynolds takes us through his south London 'gardens' and explains how his work relates to environmental activism. For more details and other videos, check out: barbican.org.uk ... "radical nature" barbican "barbican art gallery" art "guerilla gardening" "richard reynolds" "environmental activism" "eco art" "art gallery london" "environmental art" "barbican ...