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zomgwtf
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This is one of the positive environmental impacts from using genetic modification. Another which I can think of off the top of my head is phytodetoxification.Ygggdrasil said:Ironically, some of the greatest advantages of using GM crops are environmental. Although people like to tout things like golden rice, the vast majority of GM crops in use are those engineered for herbicide resistance, namely resistance to glyphosate (Round up). Glyphosate is a relatively safe, broad-specturm herbicide. It is able to kill many species of weeds, and because it biodegrades quickly, it is less harmful to the environment than other longer-lived herbicides. While glyphosate would kill most normal crops, GM crops have been engineered to tolerate glyphosate, allowing farms to use glyphosate for weed control in fields where glyphosate-resistant crops are growing.
Being able to control weeds using a single herbicide versus a cocktail of many herbicides, many of which are less environmentally-friendly than glyphosate, is a huge advantage of GM crops. Yes, treating fields with glyphosate still has environmental consequences, but it is much better than most of the alternative chemicals used for weed control. Thus, these GM crops reduce the amount of agricultural chemical that these farms use, and allows the farms to use chemicals that are much more environmentally-friendly than their alternatives. Furthermore, whereas farms used to have to till their fields to plow up weeds and mix herbicides into the soil, glyphosate is effective enough to allow farmers to keep tilling to a minimum. Reducing the amount of tilling on the farm reduces soil erosion, prevents runoff of agricultural chemical into water supplies, and reduces CO2 emissions because the farms do not have to run their heavy machinery as often. Of course, since the companies that sell GM crops are the same companies that sell agricultural chemicals, they do not often tout these environmental benefits as it necessarily shines a bad light on some of their other products.
However, I would be remiss if I did not also mention that the widespread use of glyphosate is contributing to the development of glyphosate-resistant "superweeds." Should these become more prevalent, this advantage of glyphosate-resistant GM crops would not be so great.
For more info see the following piece from the NY times. It focuses on the problem of glyphosate-resistant weeds but in the process talks about the environmental benefits of using glyphosate-resistant crops: https://www.nytimes.com/2010/05/04/business/energy-environment/04weed.html?emc=eta1
There's an article on this in Nature from 2000 but it's not freely available. Here's the citation I have for it from my Mendeley:
Bizily, S P, C L Rugh, and R B Meagher. “Phytodetoxification of Hazardous Organomercurials by Genetically Engineered Plants.” Nature Biotechnology 18.2 (2000) : 213-7.
Basically we can develop plants which are able to clean up the pollution we have caused. This article deals more with mercury pollution in wetlands and coastal areas. There are trees which are able to detoxify the mercury found which is very harmful to humans and other animals.
I honestly think the positive implications of genetic modification are endless, we obviously have to do this in a very conscientious way and make sure we uphold proper procedures prior to introduction to the wild but still... most of the negative connotations surrounding genetically modified foods are from ignorance and fear mongering.
As a side note, I don't think the reason golden rice hasn't been able to be sent to nations for human consumption is directly 'out of fear'. (That's to say the countries aren't refusing to use it based solely on fear of GM foods) It's more out of the fact that it hasn't been approved yet for human consumption and it's lost its funding grant (has it received it again). (AFAIK) The human consumption part is a valid concern IMO. There are valid arguments against the restrictions and requirements though, which mostly ARE due to fear etc..
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