WASHINGTON -- The top executives at the largest publicly held fossil fuel companies in the United States have made nearly $6 billion in the last five years -- enough to double the U.S. commitment to addressing climate change abroad. A new report from the Institute for Policy Studies, released Wednesday, analyzes the compensation for the top five executives at the 30 largest oil, gas and coal companies in the country as reported to the Securities and Exchange Commission, which totaled $5.97 billion between 2010 and 2014.