Question

if species extinction is catastrophe of human being extinction

Answer 1

1 million

1 millionA sweeping report assessing the state of the natural world found that humans are having an “unprecedented” and devastating effect on global biodiversity, with about 1 million animal and plant species now threatened with extinction

While extinction of animal species is part of the natural process of evolution, the expansion of the human species has led to significant increases in the extinction rate. Because humans share ecosystems with endangered species, our quality of life and our survival is linked to themSome scientists estimate that up to half of presently existing plant and animal species may become extinct by 2100. A 2018 report indicated that the phylogenetic diversity of 300 mammalian species erased during the human era since the Late Pleistocene would require 5 to 7 million years to recover.

Answer 2

Explanation:

The year has been identified: 2100. Only the date is yet to be announced. The sixth mass extinction may obliterate life like it had happened five times on Earth in the past. So, is it time to make plans to leave the planet? If media headlines are to be believed, then science has finally agreed with Hollywood scriptwriters of disaster films: the end is less than 100 years away.

That end could be much swifter, of course, if North Korea and the US start anuclear war. But before we decide on building our moon-bound catamaran let us examine what Daniel Rothman, professor of geophysics in the MIT Department of Earth, Atmospheric and Planetary Sciences, has predicted in his paper, ‘Thresholds of Catastrophe in the Earth System’, published in the journal Science .

In the 540 million-year of life on the planet, Earth has been witness to five mass extinction events. According to Rothman’s hypothesis, mass extinction in the past has occurred when one of two thresholds was crossed. These thresholds are linked to carbon cycles and timescales.