Trust in nature? Excuse me? Nature is the craziest chemical lab ever existed, period. The sheer amount and variety of things and substances it manages to produce is simply astounding (we probably know about only a fraction of them), and a lot of them are incredibly bad for your health. Viruses transport genetic material between species since the dawn of time. That doesn't mean that cloning a neanderthal would be a good idea, or that we can't produce unhealthy things (we can, we can). It simply means that your reasoning is fallacious, or that you're not reasoning at all.
Chances are, 99% of food you eat in your daily diet has been artificially selected by humans by trial and error: it's composed by plants and animals that never existed in nature (and would never had existed in nature). Today, bioengeneering permits us to do the same things, faster, better and safer. If there's a problem here, it lies in intellectual property laws and excessive regulation, not in science.
We should grow out of this useless natural-vs-artificial dicotomy, and embrace new possibilities in a way that is both open and responsible, based on rational facts and not on witch hunts. Turns out that a rational analysis of GM foods shows that they could be good for both our health *and* the environment.
On the GM food topics, hear mark lynas, he is way more convincing than me:
http://www.marklynas.org/2013/01/lecture-to-oxford-farming-conference-3-january-2013/