LONDON (AP) - Environmental campaigners marched through London yesterday to demand action to combat the threat of global warning, one of many demonstrations scheduled around the world to coincide with critical climate talks in Montreal, Canada.

Other marches were expected in 32 countries, including Canada, Japan, Bangladesh, Brazil, Australia and South Africa.

The London march was organised by Britain's Campaign Against Climate Change, an umbrella body encompassing many environmental and political groups.

The parade passed Downing Street, home of Prime Minister Tony Blair, where protesters handed in a letter demanding that the government reaffirm its commitment to an international climate treaty with legally binding targets on emissions reductions.

"If the UK is serious about leadership on climate change then our government needs to take action at home," Friends of the Earth campaigner Nick Rau said.

"It isn't too late - if the UK cuts its carbon dioxide emissions every year, starting now, we really can achieve the big reductions needed in the long term."

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