The Administrator shall provide Congress with a report within eighteen months after November 5, 1990, and biennially thereafter, containing a detailed description of the actions taken to implement the strategy to promote source reduction developed under section 13103(b) ^[1] of this title and of the results of such actions. The report shall include an assessment of the effectiveness of the clearinghouse and grant program established under this chapter in promoting the goals of the strategy, and shall evaluate data gaps and data duplication with respect to data collected under Federal environmental statutes.