Ramya Raghavan, Nonprofits and Activism Manager at YouTube, briefs journalists on the digital media art installation "CO2 CUBES: Visualize a Tonne of Change" which will be unveiled in Copenhagen at the start of the December 2009 UN Conference on Climate Change. The installation, powered by Google and YouTube, will give viewers a sense of the monumental scale of carbon dioxide released into the air by human activity, in effect making visible a metric tonne of CO2 in solid form.