Dangerous? The whole of witchcraft is about Nature! There are dangerous things in Nature, of course; many poisons, to leave well alone.But that is acquired knowledge, what to use, and what not!
Nature is full of magic! So study all the aspects of Nature; animals, Herbs for healing, and just the thrill of "knowing" what Nature is all about.
Everything in existence comes from nature including magick. Humans are part of nature as we too are animals, man made materials are derived from natural resources, when casting a spell you often draw on the energies of the elements and nature, etc... In the end, magick included, nothing is without some form of connection to nature.