BusinessGreen: An estimated 35,000 protestors descended on Washington yesterday to call on President Obama to block the controversial Keystone XL tar sands pipeline once and for all.
The "Forward on Climate" event was hailed as the largest climate change protest in US history by organisers and will further crank up pressure on Obama ahead of the crucial decision later this year on whether the pipeline can proceed.
The protest, which was backed by a host of green NGOs, including the 350.org campaign, the Sierra...