This week the International Energy Agency (IEA) revealed carbon dioxide emissions hit a record high last year. "Energy-related carbon-dioxide (CO2) emissions in 2010 were the highest in history, according to the latest estimates," the IEA said in a statement. Emissions are estimated to have climbed to a record five percent jump from the previous record year in 2008, when levels reached 29.3 gigatonnes, the IEA added.