Consider the figures below, which depict total annual CO2 production and per person CO2 production for the United States, China, India, and Brazil over the past 30 years. Some people argue that China and India have the biggest responsibility to cut emissions, because they represent the greatest long term emissions sources. Others argue that because the United States has such high per person emissions it bears the greatest responsibility. Which, if either, of these arguments do you find more compelling? Why? Does the historically low total and per person emissions from countries like Brazil affect your decision?