(f) 观测地球 从轨道上观测地球 可对大规模 长期的环境变化进行研究 可增进对森林 海洋和山脉的了解 可研究火山 古陨石冲击 飓风和台风的影响 另外 还可以观测人类给地球造成的变化 空气污染 如城市上空的烟雾 破坏森林和砍伐树木 石油溢漏造成水污染 这一切的后果都可以从太空清楚地观测到 也可用图片捕捉到 提供从地面无法获得的全球景观
(f) Watching the Earth: Observations of the Earth from orbit help the study of large-scale, long-term changes in the environment. Studies in this field can increase understanding of the forests, oceans and mountains. The effects of volcanoes, ancient meteorite impacts, hurricanes and typhoons can be studied. In addition, changes to the Earth that are caused by the human race can be observed. The effects of air pollution (such as smog over cities), deforestation (the cutting and burning of forests) and water pollution (such as oil spills) are visible from space and can be captured in images that provide a global perspective unavailable from the ground.