MONTREAL (AP) – Thousands of protesters took to the streets in cities worldwide Saturday to demand urgent action on global warming as delegates continued their work at an international climate change conference to review and update the Kyoto Protocol.

Police said about 7,000 people marched in downtown Montreal – some dressed up as polar bears. Five environmental groups, including Greenpeace and the Climate Crisis Coalition, delivered a petition signed by 600,000 Americans to the U.S. consulate in Montreal urging President Bush and Congress to help slow global warming.

“We’re worried about climate change, about ways of life in the Canadian Arctic disappearing,” said Sarah Binder of Montreal’s Urban Ecology Center.

Organizers said 10,000 people marched through London, passing Prime Minister Tony Blair’s home on Downing Street, where they delivered a letter demanding the government reaffirm its commitment to Kyoto with legally binding targets on emissions reductions.

Chanting and blowing whistles, the marchers denounced Blair and Bush for their perceived environmental failings. Some held banners depicting Bush as “Wanted – for crimes against the planet” and advising “Ditch Blair, not Kyoto.”

Canada’s Environment Minister Stephane Dion, who is presiding over the 10-day U.N. Climate Change Conference in Montreal, also took part in the march and said final negotiations next week involving some 120 environment ministers and other government leaders would be crucial to improving the Kyoto agreement.

Bush has been widely criticized for pulling out of the treaty, which binds industrialized nations to lower greenhouse gas emissions. The United States – which spews out nearly 25 percent of the world’s carbon emissions – was the target of many demonstrators Saturday.

In Boston, speakers called on Massachusetts to join with seven other Northeast states that are putting limits on carbon dioxide emissions from power plants. Gov. Mitt Romney has not signed on because he’s concerned that the pact could increase utility rates.

Several environmental groups rallied at Cathedral of St. Paul, an Episcopal church at the foot of Beacon Hill. About 60 people attended, said Marc Breslow, director of Massachusetts Climate Action Network.

“We’re trying to get Gov. Romney moving on this,” Breslow said afterward. “This potentially creates a regional system similar to what Europe has created. People see this as a potential precursor to a national system.”

The pact aims to reduce greenhouse gas emissions from power plants by 10 percent by 2020. The benefits are numerous, Breslow said.

“We won’t lose our beaches,” he said. “We won’t lose our oak trees. We won’t have more-intense storms.”

Protests were expected in 32 countries, including Canada, the United States, Japan, Germany, France, Bangladesh, Brazil, Australia and South Africa.

In Washington, drivers of hybrid cars planned to rally around the White House. In New Orleans, residents intended to hold a “Save New Orleans, Stop Global Warming” party in the French Quarter.

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On the Net:

U.N. Framework Convention on Climate Change: www.unfccc.int

Global March for the Climate: http://www.3dec2005.org/-en-

AP-ES-12-03-05 1932EST