60% Of All Mammals On Earth Are Livestock, Says New Study

A new study published in Proceedings of the National Academy of Sciences of the United States of America highlights the impact humanity has upon biodiversity and wildlife on Earth, although humans make up only a minute portion of all life on the planet.

As of the study’s publication date (May 21, 2018), the 7.6 billion humans on Earth equated to just 0.01 percent of all the world’s inhabitants, however, the species maintains a significant impact on other life forms. Since civilization was established, the human race has caused the loss of 83 percent of all wild animals and 50 percent of all plants. Simultaneously, livestock farmed for human consumption represents a large portion of animals on Earth, meaning the natural harmonious balance between species is decreasing while farming animals for food is increasing.

The study also revealed that 70 percent of all birds on Earth are farmed poultry, leaving a mere 30 percent to be wild. However, the percentage of wild mammals was far and few between; 60 percent of the mammals on Earth are livestock (predominantly cattle and pigs), 36 percent are humans, and just four percent of the living mammals on the planet are wild animals.

Additionally, the whaling industry, that has operated for 300 years, is responsible for the 80 percent decline in marine life.

Overall, 82 percent of life on Earth is made up of plants, 13 percent is bacteria, and just five percent of life on Earth is animals.

Another report, released last year, said that within the past 50 years alone, an estimated half of animals on Earth were lost to industrialization. However, the large proportion of livestock being farmed for food is an unsustainable method of feeding the world, according to a report released earlier this month. It said the food industry could feed a vastly greater amount of people by cultivating plant crops rather than raising livestock.

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https://www.pnas.org/content/115/25/6506