GMOs have their pros and cons, but in terms of their effects on biodiversity, the technology is almost exclusively negative in the way it affects the environment. Genetically modified foods can harm agriculture because they allow fewer restrictions on the use of chemicals, which leads to stronger weeds and weaker soil. Crops can easily spread their genetically modified genome through the wind. GMOs harm living organisms by making harmful insects stronger and viable insects weaker. Genetically modified foods are linked to declining mammalian and bird health, and the introduction of genetically modified animals such as salmon poses a threat to the wild fish ecosystem. GMOs can also have consequences in terms of genetic pollution and alteration through contamination and mutation up to adaptation to evolution and even extinction of species. Indeed, some claims are not well supported and may require testing, such as genetic alteration through consumption or the validity of the correlation between animal health deficits and genetically modified feed. However, overall, genetically modified foods clearly negatively impact the world in terms of biodiversity and impacts on ecosystems. With all the controversy over GMO foods: health versus biodiversity; benefits versus dangers; pros cons cons, one topic that always comes up is the issue of labeling. Labeling has been an issue of discussion for years, and costs, as many anti-labeling groups argue, would not actually increase as a result of adding a few more words on product stickers or boxes. The only cost would be for people to finance GM companies of their own free will, which is why big companies are investing so much to keep people in the dark about what they are buying. The right to know what is in your food should be a fundamental American right, and the narrow difference between genetically modified and organic foods is not a sufficient argument for withholding information, however trivial it may be, about their food products from consumers..