The release of carbon dioxide (CO2 ) during a product’s manufacture and use is sometimes referred to as its ‘carbon footprint.’ Coal, oil, natural gas and wood all contain solid carbon that becomes CO2 gas when the material is burned for energy. Because CO2 release contributes to climate change, and because of the need to conserve our energy resources, there is a desire to reduce the footprint of products and to choose products with a smaller carbon footprint
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