The interactive graphic below shows greenhouse gas (GHG) emissions associated with sources and activities within city boundaries. The greenhouse gases of carbon dioxide, nitrous oxide, and methane are weighted according to their relative impact on the climate and reported as carbon dioxide equivalents (CO2e). The greenhouse gas calculations are consistent with the U.S. Community Protocol for Accounting and Reporting of Greenhouse Gas Emissions, Version 1.1, July 2013, produced by ICLEI.