https://www.pnas.org/doi/full/10.1073/pnas.1704949114
https://en.wikipedia.org/wiki/Holocene_extinction
"The contemporary rate of extinction of species is estimated at 100 to 1,000 times higher than the background extinction rate"
"the current rate of extinction is 10 to 100 times higher than in any of the previous mass extinctions in the history of Earth."
"There is widespread consensus among scientists that human activity is accelerating the extinction of many animal species through the destruction of habitats, the consumption of animals as resources, and the elimination of species that humans view as threats or competitors."