Protestors at a climate change rally in Parliament Square London in December 2008 with Big Ben behind, London, England, United Kingdom, Europe

london climate change global warming protest protestor protesting march action direct action publicity poster banner movement pressure affirmitive action rally green environmental movement campaign placard big ben parlaiment houses of parliament parliament square day outdoors people men protestors environment capital cities city location westminster posters banners rallies placards england great britain united kingdom europe man groups costumes horizontal