TOEFL統合ライティング

📖 読解文章

The colonization of Mars has been a topic of intense scientific debate. Proponents argue that establishing a permanent human settlement on Mars is both feasible and necessary for the survival of our species. Three main reasons are often cited to support this view. First, Mars possesses abundant natural resources, including water ice at its poles and minerals in its soil, which could be extracted to support life and fuel production. Second, the planet’s distance from Earth—approximately 225 million kilometers at its farthest—provides a natural buffer against terrestrial disasters, such as asteroid impacts or nuclear war, ensuring the continuation of human civilization. Third, the harsh Martian environment, characterized by thin atmosphere and extreme cold, could be mitigated through advanced technologies like terraforming, which would eventually make the planet more Earth-like and habitable.

🎧 リスニング講義

The lecture challenges the assumptions in the reading about Mars colonization. While the reading celebrates the availability of water ice and minerals, the professor points out that extracting these resources would require massive energy inputs and complex machinery, which are currently impractical given the logistical constraints of transporting equipment to Mars. Moreover, the idea that Mars offers a safe haven from Earth’s disasters is flawed; the planet is exposed to harmful cosmic radiation due to its weak magnetic field, and any settlement would be vulnerable to solar storms, making it no safer than Earth. Finally, the professor dismisses terraforming as a distant fantasy, noting that Mars lacks a thick atmosphere and a global magnetic field, and even if we could introduce greenhouse gases, the solar wind would strip them away over time. Thus, the lecture concludes that the obstacles to Martian colonization are far more severe than the reading suggests.