Transcript

[ANIMAL AND BIRD SOUNDS]

Sir David Attenborough: We live in extraordinary times. We're surrounded by more species of animals and plants than has probably ever existed at any one time in the history of the Earth. For nearly 50 years, I've been lucky enough to spend my time travelling around the Earth documenting those animals and those plants. But it's now increasingly apparent that one species-- our own-- has developed the unique ability of so altering its surroundings that it can destroy whole species, indeed, whole environments.