Thousands of activists block London roads to demand action on climate change

LONDON - Thousands of environmental activists paralysed parts of central London on Monday by blocking Marble Arch, Oxford Circus and Waterloo Bridge in a bid to force the government to do more to tackle climate change.

Under sunny skies, activists sang songs or held signs that read "There is no Planet B" and "Extinction is forever" at some of the capital's most iconic locations. Roadblocks will continue night and day at each site and the demonstrators say the protests could last at least a week.