虽然世界饿了，但更渴了。虽然地球上近四分之三的面积被水覆盖，但我们仍然缺乏饮用水。这是因为地球上约97%的水是海水。所以我们不能用它来浇灌植物或直接饮用。人类只能饮用和使用来自河流、湖泊和地下的淡水。

As the final scenes unfold, viewers witness the culmination of the numerous crises he faces. By the end, Superman rejects his ...

The first flight mission for planetary defense, NASA's Double Asteroid Redirection Test (DART) seeks to validate a method to ...

We believe time is of the essence, especially given the broader context of violence against those who stand up to protect the Earth. In 2016, the internationally celebrated Honduran Indigenous ...

November 10, 2021, is Call to Earth Day. CNN is partnering with schools, organizations and individuals across the world to raise awareness of environmental issues and to engage with conservation ...

Taking center stage before a packed audience of environmental leaders, government delegates, and global press, Choudhary ...

Since Earth has survived for over 4.5 billion years, why should we consider any need to protect Earth now—assuming we can? She has survived cosmic forces, meteor impacts, volcanic eruptions, ice ...

Every day, Earth is bombarded with hundreds of tons of small objects. Planetary defense is the effort to monitor and protect Earth from asteroids, comets and other objects in space. Earth's ...

How to protect half of Earth to ensure it protects sufficient biodiversity. Science Advances, 2018; 4 (8): eaat2616 DOI: 10.1126/sciadv.aat2616. Credits . Shreya Dasgupta Editor. Topics.

How "asteroid detectives" protect Earth from potential impacts 03:15. Astronomers believe that 14,000 undiscovered near-Earth objects like asteroids, large enough to cause damage, could be in ...

Asteroid impacts with Earth are a near-certainty, scientists say. The question is: What, if anything, should we do to track asteroids and protect Earth from them?

For Katto, protecting our Earth is not only about broad, international legal frameworks but the smaller changes - and expertly trained people - that make justice systems work.