In real estate, location is everything. The same can be said about green manufacturing. Where a product is manufactured, how far supplies travel to the factory, and how far finished products travel to customers play a big role in a company's overall environmental footprint. A product's environmental impact is contained in its “embodied energy,” or the amount of energy used in every phase of its production, from resource extraction to transportation. Green manufacturing guru David Dornfeld, relying on data from the Ford Motor Company, notes that manufacturing a car in France, which derives most of its power from nuclear energy, creates about one seventh the amount of greenhouse gas emissions as manufacturing the same car in the United States, which relies much more on coal and natural gas-fired power plants.48 Manufacturing the same car in China, which overwhelmingly relies on coal-fired plants, will produce 10 times the amount of greenhouse gas emissions as manufacturing it in France. The differences can even be seen on the state level. Dornfeld notes that a car manufactured in California, which uses a mix of renewable energy sources such as wind and solar, results in three times fewer GHG emissions than a car manufactured in Kentucky, which relies predominately on coal-fired plants.49