The exact numbers of plant and animal species on earth are unknown. What we do know, though, is that there is a dramatic decline in the variety of species mainly triggered by man. The "threats to biodiversity" as well as their causes are the topics of this film. It illustrates the reckless exploitation of the resources of the earth on land and in the oceans.
Deforestation, overfishing and pollution of the seas destroy habitats and thus an ever increasing number of animal and plant species. The climate change, equally accelerated by humans, also contributes to a speedup of species extinction.