The conservation movement – the protection of natural resources and wildlife – was first formulated and implemented (33) . That this happened relatively early, during Theodore Roosevelt’s administration (1901–1909), meant that later generations of Americans could still enjoy their country’s natural wonders. It was very difficult for many Americans to believe that their continent-sized nation with its enormous forests, thousands of lakes, and vast wilderness areas could have the problems which many smaller and more crowded nations faced. True, Los Angeles obviously had a problem with air pollution, but there was still nothing anywhere like the “killer smog” (34) . Similarly, the U.S. had such enormous resources, (35) that they could ever be exhausted. Starting in the early 1960s, however, Americans finally realized that the U.S. was in danger of destroying many of its national treasures. A good example of this is (36) , the shallowest of the Great Lakes. Industrial wastes, chemicals, and fertilizers were endangering the once enormous stocks of fish. Suddenly, it seemed, the lake was almost “dead”, and the millions who used its sandy beaches and fished its waters were shocked (37) . Public attention to the problems of pollution has now become part of American life. Even the familiar Coca Cola can has been affected. Today, by law, these cans must be made so (38) . A as a political program in the United States B that the rings on top can’t be thrown away C that it was hard to imagine D that the environment will be spoiled E which caused some 3,500–4,000 deaths in London in December 1952 F that this could have happened G what was happening to Lake Erie H what most people need to know

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