Read the passage and answer the questions. ① Not long ago, the British "Guardian" rated it as "the worst invention of mankind", and plastic bags unfortunately "won" this title.

1. Cannot be removed. "Unexpectedly" can express unexpected and unexpected meanings, emphasizing the amount of plastic waste.

2. ① It is difficult to degrade naturally; ② It destroys the soil; ③ It causes the death of selected animals; ④ It pollutes the atmosphere.

3. Use specific examples to illustrate the hazards of plastic bags.

4. Answer example: Reject white pollution and welcome the Green Olympics. Stay away from plastic bags. Enter a better life. (It’s enough to highlight the theme and use appropriate language)