Well, I will talking about of genetic modified organisms. As brief introduction, all organisms are
develop continually according to environmental stimuli, this is called
adaptation. For adaptation happen, within each organisms occur changes in the
DNA but, this naturally is very low. Thus, the organisms had can survive an any
conditions.
However, in the last time this changes have been
very fast because of global warming, and many organisms, as plants and
animals, have not been adapted at the same rhythym, and they can not survive. The
same occur with the crops can not to adapt and its efficient use of resources is
low, too.
In the history, the transgenics born as famine
in the world (India), so a scientis breeded some grians crops and he got to
increase the yields of this crops whit the breeded. This scientis is called Borlaug and himself
considered that the creating transgenic as a natural extension of their work in
the green revolution must be continued.
I leve you a link the others positives things
of transgenics: http://www.actionbioscience.org/esp/biotecnologia/borlaug.html
Disadvantages are GM crops pose increasing the use of toxic
chemicals in agriculture. Such products may not only affect the transgene
product, but also seriously affect traditional varieties, destroying them and
causing irreversible loss to biodiversity. We have known many cases where
farmers are forced by law to cultivate GMO seeds only and, therefore, has been
losing traditional seed. Also, is says that increase the rate of allergies.
Personally, I think that breeding is necesary because the
must have food for all and the crops no modified can not to response at the demand
global but must exists ecological management of this crops.
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