>we are told that a modified tomato is not different from a naturally occurring tomato. That is wrong: The statistical mechanism by which a tomato was built by nature is bottom-up, by tinkering in small steps (as with the restaurant business, distinct from contagion-prone banks). In nature, errors stay confined and, critically, isolated.
source: https://www.nytimes.com/2015/07/14/business/dealbook/another-too-big-to-fail-system-in-gmos.html
Also, potentially GMO crops are affecting bees pollination process and subsequently bee population numbers.