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Leia o texto para responder às questões de 14 a 18.
Published research from the University of Vienna and the Swiss Federal Institute of Technology Zurich now establishes that human activity has pushed the planet’s rotation into territory unlike anything in 3.6 million years — and the engineers who keep Global Positioning System (GPS) working are already watching the numbers.
The finding, published in March 2026 in the Journal of Geophysical Research: Solid Earth, quantifies precisely what glaciologists and geodesists had been building toward: Earth’s days are currently lengthening at 1.33 milliseconds per century due to climate-driven ice melt and sea-level rise. That rate is, by the geological record stretching back to the Late Pliocene (a period in Earth’s history that lasted from about 5.33 million to 2.58 million years ago), without precedent.
A companion finding — from a separate 2023 study by Ki-Weon Seo and colleagues at Seoul National University — adds a second human fingerprint: agricultural groundwater extraction shifted Earth’s rotational pole roughly 80 centimeters eastward between 1993 and 2010 alone, making groundwater pumping the single largest climaterelated driver of polar drift, according to that research.
Together, the two lines of work establish something that the prior generation of Earth scientists could not have stated with confidence: humanity has become, in the span of decades, a geological force potent enough to alter the mechanics of how the planet moves through space.
(Maxwell Templeton. www.techtimes.com, 04.06.2026. Adaptado.)
According to the context of the third paragraph, the phrase “adds a second human fingerprint” indicates that the study from Seoul National University
denies the idea that the human element contributes positively to climate change.
demonstrates the need for double-checking previous scientific evidence.
claims that until recently no human activity had a great impact on polar drift.
shows that a new layer of human authorship can be seen in Earth’s polar change.
monitors the evidence related to human groundwater pumping in early societies.
A frase "adds a second human fingerprint" (adiciona uma segunda pegada/impressão digital humana) indica que (D) mostra que uma nova camada de autoria humana pode ser vista na mudança polar da Terra.
A primeira "pegada humana": Cientistas já sabiam que o derretimento das geleiras e das calotas polares — impulsionado pelas mudanças climáticas causadas pelo homem — altera a distribuição de massa na Terra, movendo o eixo do planeta.
A segunda "pegada humana": O estudo da Universidade Nacional de Seul descobriu que a extração massiva de água subterrânea para agricultura e consumo também redistribui tanta água pelo planeta que altera o peso dos oceanos. Isso faz com que o polo da Terra mude ainda mais.
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