1) The paragraph discusses the arguments opponents make against genetically modified crops, pointing to the enormous risks involved. While fears of diseases are hypothetical, other risks like GM crops cross-breeding with other plants to create super-resistant weeds seem more realistic. 2) According to the UK government's advisory body, GM crops pose a threat to wildlife by reducing plant diversity and destroying ecosystems. 3) In the short term, the debate over risks vs. benefits is unlikely to be resolved, as more data is needed over 10-20 years to understand disaster potential, though American farmers already grow GM crops with no reported issues so far.