As our production and manufacturing increase to meet customer demand, we make it a priority to mitigate our environmental impact by identifying and implementing measures to help reduce carbon emissions resulting from our facilities, transportation and other aspects of our operations. Beyond our Southern California manufacturing facilities, we've expanded our product manufacturing capabilities to our European headquarters in Amersfoort, Netherlands. There, we recently constructed a manufacturing facility with state-of-the-art equipment and manufacturing processes, allowing us to ship our products directly to European customers while reducing our carbon footprint.
While Applied Medical’s carbon emissions have increased 38 percent from 2013 to 2017, this change is mostly attributed to a 42 percent increase in natural gas usage. We use natural gas for our cogeneration and fuel cell systems, which account for 24 percent of our alternative energy sources.
Applied Medical designs, develops and manufactures our products in-house, without outsourcing, as part of our vertically integrated business model. By directly controlling and localizing our processes, we avoid freight-related emissions typically associated with outsourced manufacturing.
Applied Medical has installed electric vehicle charging stations at our campus in Rancho Santa Margarita, California, providing team members with the opportunity to charge their personal vehicles at work and promoting sustainability among commuters.
Our Amersfoort, Netherlands, facility utilizes a thermal heating system to heat and cool our building, reducing carbon emissions by 91 percent in the summer compared to traditional temperature control systems.