Countywide greenhouse gas emission data were inventoried for 2005 and 2010. Methodologies have changed between inventories. Emissions from water use and freight trains are new inclusions in the 2010 protocol. Agriculture emissions were included in Transportation - Off-Road Equipment for 2010.

Countywide greenhouse gas emission data were inventoried for 2005 and 2010.

*NOTE: Methodologies have changed between inventories. Emissions from water use and freight trains are new inclusions in the 2010 protocol. Agriculture emissions were included in Transportation - Off-Road Equipment for 2010.

The County of San Mateo inventoried greenhouse gas emissions for government operations in 2005 and 2010.

The County of San Mateo inventoried greenhouse gas emissions for government operations in 2005 and 2010.

Countywide greenhouse gas emission data were inventoried for 2005 and 2010. Methodologies have changed between inventories. Emissions from water use and freight trains are new inclusions in the 2010 protocol. Agriculture emissions were included in Transportation - Off-Road Equipment for 2010.