Well their testing GM canola here to see if its "safe" at the moment. Even though I have read they go through more testing and might even be safer than regular food as a result (take nuts for example, many people are very allergic to nuts but they are still sold). Although I have also read that there hasnt been any long term studies of GM foods (10/20 years etc).
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once you know how it works (properly) it doesnt seem so worrying
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Properly being the operative word there. Once GM crops are planted on a wide scale they
can not be recalled so easily. Why you ask? Contamination. GM crops can contaminate Non GM crops, even weeds can be cross bread with pollen from GM crops. So say you placed a gene in wheat to make it resistant to a spray. Everything works great for a few years and then slowly more weeds are becoming resistant. So guess what the biotech companies will do? Change the gene in the crop and the spray and it starts again. Or place genes that make the plant produce its own pesticides. Which has the same problem as before; the bugs will get resistant to the disease and the biotech companies will have to change the gene again so as to produce new pesticides. Sounds a lot like conventional spraying no? And who knows what kind of effect a plant that produces its own toxins will have when consumed on a large scale. There is already enough extra chemicals floating around in the body (I read there are 500 extra chemicals in the body that werent there 100 years ago).
I would write more, but I'v got to dash. Might not be written that well.