According to the text, which problem(s) did the first wave of environmentalism highlight?

Question

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The first wave of environmentalism highlighted the problems of industrialization and population growth, particularly the negative impact of human activities on nature and the need for conservation and preservation measures. The issues of ozone depletion and acid rain were addressed in the second wave, while sustainability became a key focus in the third wave.

According to the Text, Which Problem(s) Did the First Wave