costs incurred by the Federal Government nationwide. (7) In World War II, over 80 percent of American households purchased Victory Bonds to support the war effort, raising over $185 billion, or over $2 trillion in today’s dollars. 3. Clean Energy Victory Bonds (a) Initial capitalization The Secretary of the Treasury shall issue Clean Energy Victory Bonds in an amount not to exceed $7,500,000,000 on the credit of the United States for purposes of raising revenue for transfer to the Clean Energy Victory Bonds Trust Fund under section 9512(b) of the Internal Revenue Code of 1986. (b) Denominations and maturity Clean Energy Victory Bonds shall be in the form of United States Savings Bonds of Series EE or as administered by the Bureau of the Public Debt of the Department of the Treasury in denominations of $25, and shall mature within such periods as determined by the Secretary of the Treasury. (c) Interest Clean Energy Victory Bonds shall bear interest at the rate the Secretary of the Treasury sets for Savings Bonds of Series EE and Series I, plus a rate of return determined by the Secretary of the Treasury which is based on the economic benefit generated for the United States from the research and development portfolio of the Office of Energy Efficiency and Renewable Energy of the Department of Energy. (d) Promotion (1) In general The Secretary of the Treasury shall take such actions, independently and in conjunction with financial institutions offering Clean Energy Victory Bonds, to promote the purchase of Clean Energy Victory Bonds, including campaigns describing the financial and social benefits of purchasing Clean Energy Victory Bonds. (2) Promotional activities Such promotional activities may include advertisements, pamphlets, or other promotional materials— (A) in periodicals