b'5 2019 SUSTAINABILITY HIGHLIGHTS REPORTAn interactive sustainability installation titled What does green look like? educates visitors on BTVs energy efficiency and conservation initiatives.PHOTO CREDIT: VHBGreenhouse Gas Emissions Airports contribute to greenhouse gas emissions when they rely on fossil fuels to produce electricity, heat and cool buildings, and power vehicles. Specific sources of ground-based greenhouse gas emissions are typically Ground Support Equipment (GSE) powered by gasoline or diesel fuel; auxiliary power units, which use jet fuel to power aircraft before they take off; and lighting and HVAC systems at airport facilities that run on electricity from power plants that combust fossil fuels.BTV strives to reduce its greenhouse gas emissions primarily through the energy efficiency measures it undertakes. Between 2010 and 2013, greenhouse gas emissions deriving from electricity, natural gas, and vehicle fleet fuel consumption decreased by approximately 23 percent, from 2,287tons of carbon dioxide equivalent (tCO 2 e) to 1,771 tCO 2 e (see figure below). The 516 tCO 2 e avoided are enough to offset the greenhouse gas emissions from about 99 passenger vehicles driven for one year or approximately 1,144,517 miles.2,500Greenhouse Gas2,000 Emissions at BTVSource: City of Burlington1,500 Greenhouse Gas Trends Summary1,000Electricity500 Vehicle FleetNatural Gas0 Total2010 2013'