I don’t know about you, but when I hear about species extinctions or endangerment, I get pretty sick to my stomach. I’ve heard plenty of people wave these very real, very permanent losses off as a work of nature, of natural selection; after all, extinction has been happening since the dawn of time, right?
In a word, yes, but that’s not a complete answer; we know that the number of species becoming extinct today are largely due to the actions of humans. The main causes of endangerment and extinction are the introduction of nonnative species, disease, pollution, loss of habitat, and overhunting. Most of these are directly caused by humans, and those that are not are still somewhat due to human involvement. Read more