hard · SAT Reading & Writing
A team of chemists developed a new polymer that changes color when exposed to specific concentrations of airborne pollutants. While previous sensors required a power source to display a reading, the new material relies on a chemical reaction within the polymer's structure, making it both passive and highly sensitive. The researchers concluded that this material could revolutionize environmental monitoring in remote areas.
Which choice most logically completes the text?
- The material is primarily valuable because it is less expensive to manufacture than traditional glass sensors.
- The polymer will eventually replace every existing electronic sensor currently used in urban air quality stations.
- Pollutants in remote areas are consistently found at higher concentrations than in heavily populated industrial centers.
- The lack of an external electricity requirement allows for continuous pollutant detection in locations without a power grid.
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