http://en.wikipedia.org/wiki/Gm_food
这里是wiki的链接，自己看看吧
In 2009, countries that grew 95% of the global transgenic crops were the United States (46%), Brazil (16%), Argentina (15%), India (6%), Canada (6%), China (3%), Paraguay (2%) and South Africa (2%).[14] The Grocery Manufacturers of America estimate that 75% of all processed foods in the U.S. contain a GM ingredient.[32] In particular, Bt corn, which produces the pesticide within the plant itself, is widely grown, as are soybeans genetically designed to tolerate glyphosate herbicides. These constitute "input-traits" are aimed to financially benefit the producers, have indirect environmental benefits and marginal cost benefits to consumers.
看看这段
Coexistence and traceability
The United States and Canada do not require labeling of genetically modified foods.[54] However in certain other regions, such as the European Union, Japan, Malaysia and Australia, governments have required labeling so consumers can exercise choice between foods that have genetically modified, conventional or organic origins.[55][56] This requires a labeling system as well as the reliable separation of GM and non-GM organisms at production level and throughout the whole processing chain.[55][56]
还有这段，都有详细来源的可信文字表述。
比你们这些口说无凭的可信多了。
