Members of Hounslow Green Party joined thousands of other protesters on Saturday 3 December to take part in the London section of the International Day of Climate Protest. The centrepiece was in Montreal where the UN's climate change conference is taking place. It was the world’s first truly global protest on climate change, as demonstrations and events around the world took place in more than thirty countries with marches and rallies from New York to Paris, Lisbon to Moscow, and Seoul to Sydney – as well as in London, Edinburgh, Belfast and Dublin in the British isles.

The London march started at Lincoln’s Inn Fields, passed the ExxonMobil London offices, the Australian Embassy and Downing Street, and finished with a rally and speeches outside the US embassy in Grosvenor Square.

Caroline Lucas MEP (Green Party) said that climate change is a far greater threat than international terrorism. "Climate change is itself a weapon of mass destruction. and if Tony Blair had spent a fraction of the resources and commitment that he has spent on an illegal war in Iraq instead on tackling climate change then we might genuinely have a chance of a safer world. So we demand immediate and urgent action now."

Tom Beaton, a member of Hounslow Green Party, said after the march, "Tony Blair is now saying that it is 'unrealistic' to expect countries to accept reduced economic growth as the price for stopping climate change. The logic of this position is staggering. If that is what it will take then that is what we must press for. Tony Blair just does not understand what the word leadership means. His assertion that we should abandon treaties and agreements and hope that science and business will come up with a solution to our problems is just kow-towing to George Bush and big business. Instead of saving the planet it will give short term profit to a small number of people who clearly either have no grandchildren or who care for them so little they would sell them for sixpence. I went on this march to let government know that I am very seriously concerned and that I want government to take whatever action it takes to turn round the climate change process before it becomes irreversible."