Climate scientists around the world, represented by the Intergovernmental Panel on Climate Change
(IPCC), have an unequivocal position: human activity is changing the earth’s climate through the release of greenhouse gas (GHG) emissions caused by the combustion of fossil fuels. The longer action is delayed to reduce GHG emissions, the greater the risk is of irreversibly depleting nonrenewable resources and harming our environment.  
Being an environmentally conscious community is a key component of the San Mateo County Shared Vision 2025. And reducing the County carbon footprint is one of the key initiatives adopted by our Board of Supervisors to achieve that vision. In addition, San Mateo is a “Cool County”. The Board adopted the national Cool County declaration in 2007 which committed us to calculating greenhouse gas (GHG) emissions from our County operations every five years, inventorying our current actions to reduce emissions and developing a plan to reduce our 2005 emissions 80% by 2050 with an intermediate goal of flat emissions by 2010.