We already have released harmful things. VERY VERY harmful GMO's.
The only reason the GMO tomatos and potatos were not approved is that they killed the rats outright.
They refused to do long term studies
We had to fund them ourselves over time.
The other three crops, soy, corn, rape seed created horrible cancers in the rats over time.
The damage was sex specific.
Males survived to human age equivilant 50 years with only 30% death from cancers.
Females" 70% dead at human age 50 years with attacks on different organs.
>https://www.naturalnews.com/2019-06-12-trump-signs-executive-order-genetically-engineered-food.html