Lawrence Berkeley National Labs explores three efforts: cheap solar energy, storing carbon deep underground, and energy efficiency in China. Ramamoorthy Ramesh discusses research to make photovoltaic cells using the most abundant elements in the Earth's crust -- materials that are literally as common as dirt. Nan Zhou expliores China’s energy use and the policies that have been implemented to increase energy efficiency and reduce CO2 emission growth. Curt Oldenburg discusses a strategy to reduce carbon emissions from coal and natural gas. Series: "Lawrence Berkeley National Laboratory " [Science] [Show ID: 19342]