Not carbon or carbon-based; often used to refer to energy sources which do no generate carbon dioxide(adjective)
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Use "noncarbon" in a sentence
"The only way we are coming close to an 80% reduction is to move to noncarbon fuel for power and vehicles and if we do that it really won't matter that much if we improve our roads."
"Nuclear plants can operate at stable rates year-round, while noncarbon energy sources such as wind farms and solar panels depend on the weather to generate power."
"CLP ' s strategy — part of a larger shift to raise the company ' s noncarbon-based sources of energy to as much as 40% of generating capacity by 2020, up from a current 19% — coincides with Chinese government subsidies and policies favoring cleaner sources of power."