Plastic waste in the ocean is a familiar concern, but recent research highlights an even less visible threat: microplastics — fragments smaller than five millimeters — that have now been found in marine animals, drinking water, and human blood. Scientists are only beginning to measure their long-term health effects, but the sheer ubiquity of the particles is itself alarming to many researchers.
Which choice best states the main idea of the text?
- A
Plastic waste is a familiar environmental concern.
- Bcheck_circle
Microplastics' pervasive spread has emerged as a worrying, less-visible pollution problem.
- C
Drinking water in most countries contains microplastics.
- D
Long-term health effects of microplastics are well documented.
Explanation
The passage shifts attention from visible plastic to ubiquitous microplastics — B. A is the setup; C is a detail; D contradicts the text.