Activists blockade Canada House, Trafalgar Square, London as oil executives, bankers and diplomats meet to plan the expansion of the tar sands industry. November 20, 2012..Protesters supported by UK Tar Sands Network, London Rising Tide, People & Planet, Climate Justice Collective, Climate Rush and Occupy Energy, Environment and Equity Group released a statement saying:..?The Canadian government has wiped out its own environmental laws, is trampling on First Nations' rights, and seems hell-bent on extracting every last drop of tar by whatever means necessary. Dirty diplomats have been deployed all over the EU to undermine climate legislation which would make Europe off-limits to tar sands exports. Tar sands extraction is devastating vital ecosystems, threatening the lives of communities and pushing us into catastrophic climate change.? .