1972 An international convention of control oceanic pollution was signed by the U.S. and 90 other nations.
1972 An international convention of control oceanic pollution was signed by the U.S. and 90 other nations.
美国和90个其它国家签署控制海洋污染国际公约。
1972 An international convention of control oceanic pollution was signed by the U.S. and 90 other nations.
美国和90个其它国家签署控制海洋污染国际公约。