Extinctions

Species may become extrinct, perhaps as a result of a change in climate or increased competition from a better-adapted species

The International Union for Conservation of Nature annually publishes a Red List of threatened species; species that are under threat of extinction -of disappearing forever from the Earth

Mass extinctions - extinctions of millions of species at once- in the past are thought to have been natural, and some to have been caused by sudden changes in environment, such as a large asteroid colliding with the Earth

We are currently facing the likelihood of another mass extinction, this time caused by us

• the main reason for this is loss of habitats
• …