6 Ways Species Rely on Humans for Survival

Sometimes, a species has declined so dramatically that they require serious human intervention to ensure they don’t disappear forever. Here are six ways we’re using conservation and science to keep those species alive....
Chapters
TOXIC EXPOSURE
1:27
2 DISEASE
3:43
4 OVERHARVESTING & INVASIVE SPECIES
5:22
FIRE SUPPRESSION
7:41
LOSS OF DEPENDENT SPECIES
8:54