Task I. Fill in the correct word:
- 1. rubbish newspapers and cans
- 2. toxic fumes
- 3. pollution air, water and soil
- 4. collect rubbish
- 5. acid rain
- 6. plant trees
- 7. station a pond
Explanation: Each word from the list logically completes the sentence or phrase, forming common collocations or concepts related to environmental issues.