Overharvesting
If we use the Earth's natural resources faster than they can be replaced, species can become seriously depleted or even extinct. Fish, like cod, can be overharvested. Animals like African elephants, rhinoceroses, Asiatic bears and whales can be hunted almost to extinction for the products from their bodies.
Much of this sort of trade is highly lucrative and laws meant to protect species are frequently ignored. We need to be vigilant about using all resources wisely and protecting those species that are endangered.
