This map, produced for California Watch, shows the top 100 carbon dioxide-producing facilities in the state, according to data released by the California Air Resources Board. Power plants and oil refineries appear to be the largest culprits. I researched and mapped the individual facilities on a Google satellite image using Mapbuilder.net. I designed custom markers to visually show the amount of carbon dioxide emissions from each facility, and calculated conversions to demonstrate the scale and impact of those emissions.