在英语考研精读系统中，答案如下：
1. 问题：What is the main idea of the passage?
答案：The passage primarily discusses the importance of environmental conservation and the role of individuals in protecting natural resources.
2. 问题：Which of the following statements is NOT true according to the passage?
答案：The passage does not mention that the author has personally visited all the countries mentioned in the text.
3. 问题：What is the tone of the author in the last paragraph?
答案：The author's tone in the last paragraph is persuasive and hopeful.
4. 问题：What can be inferred about the author's opinion on technological advancements?
答案：The author implies that while technological advancements are beneficial, they should be balanced with environmental considerations.
5. 问题：How does the author support their argument in the second paragraph?
答案：The author supports their argument by providing examples of successful environmental conservation projects around the world.
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