So it may be time to rethink the viability of restoring lost or disappearing ecosystems.
{audio}http://cpa.ds.npr.org/krcb/audio/2015/09/nbr_9-25-15past_and_future_invasives.mp3{/audio}

The most impactful invasive species on the planet is said to be humankind. In North America, says permaculture designer Tao Orion, arriving Europeans overwhelmed a sustainable food crop that had previously provided for countless generations. And, she says, if revived, it still could.
{audio}http://cpa.ds.npr.org/krcb/audio/2015/09/Oaks.mp3{/audio}