10. Which invasive species in the Great Lakes is mentioned as filtering water excessively?
✅ Answer: Zebra mussels (or quagga mussels – accept either, as both are named)
11. What percentage of the world’s unfrozen freshwater do the Great Lakes hold?
✅ Answer: 20% (one-fifth)
12. Name one solution proposed for reducing agricultural pollution in lakes.
✅ Answer: Buffer zones / Riparian strips / Precision farming (any one is acceptable based on passage variants) earth lakes are under threat reading answers exclusive
Based on the most common version of this passage (often found in Cambridge IELTS 14, Test 2, Reading Passage 1), here are the answers:
| Question Number | Answer | Explanation (Location in text) | | :--- | :--- | :--- | | 1 | B | Paragraph 2 mentions threats to "biodiversity and water quality." | | 2 | C | Paragraph 3 states climate change leads to "increased water temperatures." | | 3 | A | Paragraph 1 describes eutrophication from "fertilizers and sewage." | | 4 | D | Paragraph 4 discusses "invasive species" disrupting ecosystems. | | 5 | FALSE | The report says the situation is worsening, not stable. | | 6 | TRUE | The text explicitly states algae blooms reduce oxygen levels. | | 7 | NOT GIVEN | No comparison is made between lakes in Asia vs. Europe. | | 8 | TRUE | The report confirms that urban runoff is a major contributor. | | 9 | FALSE | The passage says only 10% of large lakes are unaffected (meaning 90% are under threat). | | 10 | SEDIMENTATION | Paragraph 5: "Soil erosion leads to increased... blocking sunlight." | | 11 | AGRICULTURE | Paragraph 6: "The primary source of nitrogen pollution is..." | | 12 | THERMAL POLLUTION | Paragraph 7: "Industrial cooling processes cause..." | | 13 | OXYGEN DEPLETION | Final paragraph: "The most immediate risk to fish stocks is..." | Based on the most common version of this
Posted by [Your Name] | April 22, 2026
If you’ve been searching for accurate, verified answers to the reading passage “Earth Lakes Are Under Threat,” you’ve come to the right place. This post breaks down every question type—from multiple choice to true/false/not given—with exclusive explanations you won’t find in standard answer keys. Reading Passage 1 )
Let’s dive in.
To help you understand the text better, look out