The statistic represents the allocation of federal research and development expenditure in the United States over the period 1950-2010, by energy source. In the U.S., ** percent of total federal research and development expenditure was targeted at renewable energy.
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NEI. (October 1, 2011). Allocation of U.S. federal research and development expenditure between 1950 and 2010, by energy source [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 03, 2026, from /statistics/203156/allocation-of-us-federal-research-and-development-expenditure/
NEI. "Allocation of U.S. federal research and development expenditure between 1950 and 2010, by energy source." Chart. October 1, 2011. ÌÇÐÄÆƽâ°æ. Accessed August 03, 2026. /statistics/203156/allocation-of-us-federal-research-and-development-expenditure/
NEI. (2011). Allocation of U.S. federal research and development expenditure between 1950 and 2010, by energy source. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 03, 2026. /statistics/203156/allocation-of-us-federal-research-and-development-expenditure/
NEI. "Allocation of U.S. Federal Research and Development Expenditure between 1950 and 2010, by Energy Source." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 1 Oct 2011, /statistics/203156/allocation-of-us-federal-research-and-development-expenditure/
NEI, Allocation of U.S. federal research and development expenditure between 1950 and 2010, by energy source ÌÇÐÄÆƽâ°æ, /statistics/203156/allocation-of-us-federal-research-and-development-expenditure/ (last visited August 03, 2026)
Allocation of U.S. federal research and development expenditure between 1950 and 2010, by energy source [Graph], NEI, October 1, 2011. [Online]. Available: /statistics/203156/allocation-of-us-federal-research-and-development-expenditure/
