“Roads fragment natural habitats, and the more of them there are, the smaller and more compromised those habitats become. At the same time, roads give humans access to remote, once pristine regions, where they can begin logging, mining, accidentally (or intentionally) starting fires and much else.”

https://www.washingtonpost.com/news/energy-environment/wp/2016/12/15/humans-have-now-sliced-up-the-earths-wilderness-into-600000-little-pieces/