Human beings emit over 30 billion tons of carbon dioxide per year. It’s a global problem, connected with sea level rise and changing global temperatures. There have been many calls for reductions in CO2 emissions, but others look to technology to take CO2 out of the atmosphere and sequester or trap it below the earth’s surface. The U.S. and Europe are investing millions in developing CO2 sequestration technology. Ashley Ahearn reports how some of the most promising research in this field is happening in Iceland.