LONDON - APRIL 08:  Pedestrians stop to look at a giant cigarette butt in Trafalgar Square on April 8, 2008 in London, England. Keep Britain Tidy has dropped the butt on Trafalgar Square to highlight the fact that cigarette related litter affects 78 percent of streets in the UK. Getty Images logo Getty Images 15 months ago

LONDON - APRIL 08: Pedestrians stop to look at a giant cigarette butt in Trafalgar Square on April 8, 2008 in London, England. Keep Britain Tidy has dropped the butt on Trafalgar Square to highlight the fact that cigarette related litter affects 78 percent of streets in the UK.