A new map and the accompanying data is available for all those interested in the geography of American carbon dioxide. The results show the area between Boston and Washington is the worst with urban centers extending to the Mississippi River and into Texas forming an archipelago of CO2 releases. The Interior West, lacking in major cities for the most part, has low amounts of the greenhouse gas. Despite the efforts of California to stem its pollution, high levels are found in Los Angeles and San Francisco.
Below is a YouTube on making the map