1.   This issue surfaced recently when the US tried to ban imports of Mexican tuna.

2.   The report cites various cases by which over-emphasis on free trade can lead to environmental problems, including the recent controversy over the US import ban on Mexican tuna.

3.   Palmer also said Mexican tuna fleet observers are not as rigorous as international observers in defining acceptable risk to dolphins.

4.   The agreement would open the market to Mexican tuna.

5.   A U.S. embargo on Mexican tuna harvested at some peril to dolphins has become an international issue.

6.   She said the tuna embargo had sharply cut Mexican tuna exports and ending it would let the industry recover those markets.

7.   The Mexican tuna industry and environmentalists opposed to lifting the embargo accuse each other of using environmental issues to mask financial interests.

8.   The work stopped three years ago, two years after the United States placed an embargo on Mexican tuna.