On this week's episode of Scientific American's weekly science roundup... Visualizing the giant amoeboid tendrils of CO2 the U.S. belches every day, turning those same carbon emissions into DVDs instead of planet-killing greenhouse gasses, the nanoparticles in your socks could be killing fish and a war of press releases -- is the holy grail of cheap energy produced by thin-film solar panels just over the horizon or not? Subscribe to The Monitor via iTunes or RSS. Less