Earth Day falls on ______. Protecting the earth is a worldwide question because ______

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问题 Earth Day falls on ______.
Protecting the earth is a worldwide question because ______

选项 A、pollution is everywhere in the world
B、polluted air and water in one place affects distant areas
C、people all over the world are responsible for the pollution problem
D、all of the above

答案D

解析 本题为事实理解题.由第一段"Air and water pollution, oil spills, and toxic waste are some of the serious problems"和第二段"Pollution in one place often affects areas far away. For example, an accident in a nuclear power plant in one country can create a radioactive cloud that goes halfway around the world. Factory smoke in one country can cause acid rain in another. it is easy to see how our protecting the environment has become an international issue"可以得出正确答案为D。
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