
Species extinctions
Species extinction refers to the permanent loss of a species from Earth, meaning no individuals of that species remain alive. It can occur naturally due to factors like environmental changes or natural disasters, but human activities—such as habitat destruction, pollution, climate change, and overhunting—are increasingly responsible. Extinctions can disrupt ecosystems, as each species plays a role in its environment. The loss of biodiversity can affect human well-being, as it influences food security, medicine, and ecosystem services. Protecting endangered species and their habitats is essential for maintaining a balanced and healthy planet.