Humans are just 0.01% of all life on Earth, but have destroyed 83% of all wild mammals and half of our plant life. A new study found the weight of every kind of life form on Earth. A researcher explained how the research started. He said: "I was shocked to find there wasn't already a comprehensive...estimate of all the different components of biomass." He hopes the study will help people understand the dominant role that humans now play on Earth.
There are 7.6 billion people on Earth. We share the same level of biomass as termites. We have also managed to destroy many living species. Humans have also changed the ratio of livestock to wild animals. Today, 70% of all birds on Earth are farmed (mostly chickens). Around 60% of all mammals on Earth are livestock (mostly cattle and pigs); only 4% are wild animals. The professor said people should look more carefully at what they eat.