Police protecting the House of Parlaiment from climate change protestors on a rally in Parliament Square in December 2008, London, England, United Kingdom, Europe

london climate change global warming protest protestor protesting march action direct action affirmitive action rally green environmental movement campaign big ben houses of parliament parliament square police policing police protection protect metropolitan police barricade barrier police line day outdoors people portraits groups man men work policeman policemen barricades in a line in a row westminster capital cities city location england great britain united kingdom europe environment parliament barriers horizontal