--- title: Half-Earth description: Every year, an untold number of species either die off or become endangered. This is mostly thanks to a mix of human-led factors that scientists... canonical: https://time.com/4246103/half-earth/ author: Sarah Begley article:opinion: false article:content_tier: free article:published_time: 2016-03-03T10:57:56.000Z article:modified_time: 2026-02-22T15:35:05.522Z article:section: Science og:title: Half-Earth og:description: Every year, an untold number of species either die off or become endangered. This is mostly thanks to a mix of human-led factors that scientists... og:url: https://time.com/4246103/half-earth/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production og:image:width: 1200 og:image:height: 675 og:image:alt: TIME og:type: article twitter:card: summary_large_image twitter:title: Half-Earth twitter:description: Every year, an untold number of species either die off or become endangered. This is mostly thanks to a mix of human-led factors that scientists... twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production --- # Half-Earth by [Sarah Begley](https://time.com/author/sarah-begley/) ## Sarah Begley Mar 3, 2016 10:57 AM UTC by [Sarah Begley](https://time.com/author/sarah-begley/) ## Sarah Begley Mar 3, 2016 10:57 AM UTC Every year, an untold number of species either die off or become endangered. This is mostly thanks to a mix of human-led factors that scientists call HIPPO–habitat destruction, invasive species, pollution, population growth and overhunting–and it may well have dire consequences for our species and our world at large. To buck this trend, Pulitzer Prize winner Edward O. Wilson suggests humans take a drastic measure: devote fully half of the earth’s surface to nature reserves. This wouldn’t mean abandoning entire continents, but it could mean asking people to consider selling or trading their land to create reserves large enough to support rich ecosystems. “As reserves grow in size,” he explains, “the diversity of life surviving in them also grows.” Of course, Wilson acknowledges, there are commendable conservation efforts already under way, and communities might be reluctant to make the sacrifice he suggests. But as “the mind and stewards of the living world,” he writes, humans have a responsibility to “do no further harm to the biosphere.” –SARAH BEGLEY ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/4246103/half-earth/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/4246103/half-earth/"},"headline":"Half-Earth","datePublished":"2016-03-03T10:57:56.000Z","dateModified":"2026-02-22T15:35:05.522Z","description":"Every year, an untold number of species either die off or become endangered. This is mostly thanks to a mix of human-led factors that scientists...","url":"https://time.com/4246103/half-earth/","keywords":[],"thumbnailUrl":"","author":[{"@type":"Person","name":"Sarah Begley","jobTitle":null,"url":"https://time.com/author/sarah-begley/"}],"articleSection":"Science","image":[],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/science/","name":"Science"}},{"@type":"ListItem","position":2,"item":{"@id":"https://time.com/4246103/half-earth/","name":"Half-Earth"}}]}] ```