The King County- Cities Climate Collaboration, or K4C for short, is a group of 13 cities along with King County taking action to reduce carbon pollution from transportation, energy supply, consumption, buildings, and land use. K4C is also working to set shared goals and lead by example. The Growth Management Planning Council (GMPC) of King County adopted a target of reducing greenhouse gas emissions by 25% in 2020 compared to 2007, 50% by 2030, and 80% by 2050 which are now a shared commitment of the K4C. This stepped goal is based on the science of the Intergovernmental panel for Climate Change (IPCC), who has modeled this type of global carbon budget trajectory is necessary to avoid the worst of global climate change. To calculate the emission estimates presented in this dashboard, regionally specific emission conversion formulas are applied to annual reports of available energy, vehicle and waste data. Most emission data is presented in Tonnes, or “metric tonnes of carbon dioxide equivalent” (MTCO2e). This unit converts all greenhouse gases into the equivalent of one tonne of CO2 and accounts for the lifespan and potency of that particular gas to trap heat in the atmosphere. To learn about each city's environmental impact, follow the links below: