… $15 to 20 million of new $1,000 face value “Green Liberty Bonds” around April 22, in recognition of the 50th anniversary of Earth Day. In a twist, the new bonds will be … $15 to 20 million of new $1,000 face value “Green Liberty Bonds” around April 22, in recognition of the 50th anniversary of Earth Day. In a twist, the new bonds will be …