what is the primary cause of human-induced extinctions?
Human impacts. Most of the main causes of extinction are caused directly or indirectly by humans. Humans negatively impact the environment for controlling and artificially causing fires, shifting agriculture cultivation with unsustainable techniques, grazing by domesticated animals, overkilling species (Pleistocene overkill), etc.
Although extinction is a natural process, the rate at which current extinction is taking place is clearly not, and all scientific evidence indicates that the activities of man kind are the primary engine behind most recent and present extinction events. Major causes of extinction include: Habitat Loss Destructive change to environments or landscapes, either through natural phenomena (such as floods, volcanoes, hurricanes etc.), or human processes (such as construction, deforestation, changing landuse for agriculture, artificial land drainage etc.), is the single greatest threat to the biodiversity of Planet Earth, and the greatest cause of extinction in our world.